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Civil explosion information
Category brief summary: 民爆信息
What are the safety requirements for transporting civil explosive equipment?
What are the safety requirements for transporting civil explosive equipment?
(1)Theblastingequipmentcarriershall,inaccordancewiththe“ExplosiveGoodsTransportCertificate”issuedbythepublicsecurityorganoftheplaceofdelivery,handlethetransportationinaccordancewiththerelevantprovisionsofthecompetenttransportationdepartment,andsendafull-timeescortwhoisfamiliarwiththeperformanceoftheblastingequipmenttobetransported.   (2)Whentransportingblastingequipment,thefollowingprovisionsmustbestrictlyobserved:   1Thecarrierandtheshipmustmeetthesafetyrequirementsoftherelevantnationaltransportationregulations.Forexample,thecarandthebottomofthecarshouldbeprotectedbyliningandcushioning,andnonailsshouldbeexposed;thereshouldbedangersigns,fireextinguishers,groundingchainsandcrepeonthecar.Thevehicleisingoodconditionandtheexhaustpipeshouldbeequippedwithafireproofcap.   2Thepackagingofthegoodsshallbefirmandtight,andtheloadingshallnotexceedtheheightandedgeofthecompartmentbaffle.Theloadedexplosivesshallbetightlybound. Blastingequipmentthatisincompatiblewithnatureisnotallowedtobemixedinthesamecompartmentorcabin. Passengersandotherflammableandexplosivematerialsarenotallowedtobecarriedinthecarriagesandcabinsoftheblastingequipment.   3Railwaytransportationloadingandunloadingexplosivesshallbeprovidedwithspecialrailwaylinesandspecialrailwaystationsandspecialwarehouses. Blastingequipmentshouldbeloadedandunloadedatstationsandterminalsawayfromthecentralareaof​​thecityanddenselypopulatedareas.   4Loadingandunloadingblastingequipmentshouldbecarriedoutduringthedayasmuchaspossible.Specialpersonnelshouldberesponsiblefororganizingandguidingsafeoperation. Theloadingandunloadingpersonnelmustunderstandthesafetyknowledgeofloadingandunloadingblastingequipment. Attheloadingandunloadingsite,aguardpostshallbesetuptoprohibitunrelatedpersonnelfromentering.   5Whentransportingblastingequipmentontheroad,thevehiclemustbedrivenataspeedlimit,andthevehiclesshouldbekeptawayfromtheblast. Afterpassingthroughdenselypopulatedtowns,thelocalpublicsecurityorgansmustbenotifiedinadvanceandtravelaccordingtotherouteandtimedesignatedbythepublicsecurityorgans.   6Whentransportingblastingequipmentstopsontheway,keepawayfromthedenselypopulatedplacesofthebuildingfacilities,andhavesomeonetolookafter.Itisstrictlyforbiddentosmokeandusefireneartheblastingequipment.   Duringthedrivingprocess,itisnotallowedtoopenthebox(bag)containingtheexplosivesinthecar.   8Itisforbiddentousedumptrucks,dumptrucks,trailers,tractors,wheelbarrows,bicycles,motorcycles,motortricyclesandbatteryvehiclestotransportexplosiveequipment.   9Itisstrictlyforbiddenforindividualstocarryblastingequipmentwiththemonpublictransport. Itisstrictlyforbiddentocarryblastingequipmentincheckedbaggageparcelsandmailedmail.
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(1)Theblastingequipmentcarriershall,inaccordancewiththe“ExplosiveGoodsTransportCertificate”issuedbythepublicsecurityorganoftheplaceofdelivery,handlethetransportationinaccordancewiththerelevantprovisionsofthecompetenttransportationdepartment,andsendafull-timeescortwhoisfamiliarwiththeperformanceoftheblastingequipmenttobetransported.   (2)Whentransportingblastingequipment,thefollowingprovisionsmustbestrictlyobserved:   1Thecarrierandtheshipmustmeetthesafetyrequirementsoftherelevantnationaltransportationregulations.Forexample,thecarandthebottomofthecarshouldbeprotectedbyliningandcushioning,andnonailsshouldbeexposed;thereshouldbedangersigns,fireextinguishers,groundingchainsandcrepeonthecar.Thevehicleisingoodconditionandtheexhaustpipeshouldbeequippedwithafireproofcap.   2Thepackagingofthegoodsshallbefirmandtight,andtheloadingshallnotexceedtheheightandedgeofthecompartmentbaffle.Theloadedexplosivesshallbetightlybound. Blastingequipmentthatisincompatiblewithnatureisnotallowedtobemixedinthesamecompartmentorcabin. Passengersandotherflammableandexplosivematerialsarenotallowedtobecarriedinthecarriagesandcabinsoftheblastingequipment.   3Railwaytransportationloadingandunloadingexplosivesshallbeprovidedwithspecialrailwaylinesandspecialrailwaystationsandspecialwarehouses. Blastingequipmentshouldbeloadedandunloadedatstationsandterminalsawayfromthecentralareaof​​thecityanddenselypopulatedareas.   4Loadingandunloadingblastingequipmentshouldbecarriedoutduringthedayasmuchaspossible.Specialpersonnelshouldberesponsiblefororganizingandguidingsafeoperation. Theloadingandunloadingpersonnelmustunderstandthesafetyknowledgeofloadingandunloadingblastingequipment. Attheloadingandunloadingsite,aguardpostshallbesetuptoprohibitunrelatedpersonnelfromentering.   5Whentransportingblastingequipmentontheroad,thevehiclemustbedrivenataspeedlimit,andthevehiclesshouldbekeptawayfromtheblast. Afterpassingthroughdenselypopulatedtowns,thelocalpublicsecurityorgansmustbenotifiedinadvanceandtravelaccordingtotherouteandtimedesignatedbythepublicsecurityorgans.   6Whentransportingblastingequipmentstopsontheway,keepawayfromthedenselypopulatedplacesofthebuildingfacilities,andhavesomeonetolookafter.Itisstrictlyforbiddentosmokeandusefireneartheblastingequipment.   Duringthedrivingprocess,itisnotallowedtoopenthebox(bag)containingtheexplosivesinthecar.   8Itisforbiddentousedumptrucks,dumptrucks,trailers,tractors,wheelbarrows,bicycles,motorcycles,motortricyclesandbatteryvehiclestotransportexplosiveequipment.   9Itisstrictlyforbiddenforindividualstocarryblastingequipmentwiththemonpublictransport. Itisstrictlyforbiddentocarryblastingequipmentincheckedbaggageparcelsandmailedmail.
Blasting Demolition of a 21-story Full Shear Wall Structure Building
Blasting Demolition of a 21-story Full Shear Wall Structure Building
Completiontime:June2004   ProjectLocation:WuningTown,DongyangCity,ZhejiangProvince   Completedunit:ZhejiangJinganBlastingEngineeringCo.,Ltd.   Projecthostandparticipants:WangXiaMing,ChengCailin,GuPing,DuZhonglong,HeHuawei   ContributedbyChengCailinandDuZhonglong     1ProjectOverview   TheWuningTownGovernmentBuildingofDongyangCityislocatedattheintersectionofRenminRoadandZhenxingRoadinDongyangCity,ZhejiangProvince.Theeastsideisabout18mawayfromRenminRoad,thesouthsideisabout50mawayfromZhenxingRoad,thenorthsideis25mfortheNationalLandBuilding,andthewestis9mforresidentialbuildings.   Thebuildingisdividedintotwoparts,themainbuildingandthepodium.Itfacessouthandisintheshapeofa“sail”. Themainbuildinghas19floorsintheeasthalfand2layersinthewesthalf.Thetotalheightis70.3mandthebuildingareaisaboutl1000m. . Themainbuildingisafullshearwallstructure,withthe"work"shapeshearwallasthemainload-bearingmember,thecontactbeamasthelapjointmember,theeast-westspanplustheelevatorshaftforthesevencolumns,thenorth-southspanplusthecorridorforthethree-span,thewestsideofthemainbuildingTherearedoubleelevatorshaftsandinnerstairs.Therearesingleelevatorshaftsandinnerstairsontheeastside.Theeastandwestsidesofthebuildingareasymmetricalinstructure;themainbuildingisafour-storypodiuminthesouth,northandwest,whichisaframestructure. ThesurroundingenvironmentofthebuildingisshowninFigure1.    2Characteristicsanddifficultiesofthedemolitionproject   (1)Thebuildingtobedemolishedisafullshearwallstructure.Duetotheasymmetricalstructureontheeastandwestsidesofthebuilding,theheightisdifferent,andthecenterofgravityiswestward.Therefore,theopeningstressoftheblastinggapisbalancedtoensuretheaccuracyofthedirectionaldumpingaftertheexplosion.   TheplanestructureofthebuildingisshowninFigure2.    (2)Thebuildingislocatedinthedowntownarea,andtherearemanybuildings(structures)tobeprotected.Itis9mfromthewestofthebuildingand45mfromthesouth.Thereareoverheadpowerlinesandcommunicationlinesonthesouthrevitalizationroad.55m;12montheeastsidehasavarietyofimportantpipelinefacilitiessuchasundergroundcommunicationcables,militaryopticalcables,undergroundcables,etc.,andthereareф600mmcementwatersupplypipesat17montheeastside.   (3)Becausetheconstructionperiodisonly20days,plustheconstructioniscatchingupwiththestudents'collegeentranceexaminationandthemiddleschoolentranceexaminationperiod,itisimpossibletoworkovertimeatnight,whichbringsgreatdifficultytotheconstructionprogress.   3Selectionofblastingdemolitionplan   Accordingtotheon-siteenvironmentalconditionsandthestructuralcharacteristicsofthebuilding,ablastingdemolitionschemewithmultiplegapstothesouthisused.   3.1Blastinggap   Themaximumnotchheightofthelowernotch,theformula:H=Btanф   IntheformulaB-thewidthofthebuilding,B=16.2m;ф-thenotchelevationangle,takeф=41°,tanф=0.87.   ThesurrogatevalueiscalculatedasH=14.1m.   Theheightofthetoppanelofthefourthfloorofthebuildingisjust14.1m,whichmeansthatthefrontrowcanbefrieduptothefourthfloor. Inordertomakethebuildingcollapsesmoothly,theheightoftheelevatorshaftandthestairwellisincreasedbyonelayerhigherthantheheightofthefrontrowofcolumns.   Twoauxiliarygapsareopenedinthe9thto10thfloorsand14thto15thfloorsofthebuilding.TheinternalI-shapedshearwallisalsopre-treatedanddrilledandblasted.TheblastinggapandtheholeareshowninFigure3.      3.2Pretreatmentofshearwall   Themainbuildingisdividedintofrontandreartwo-spanI-shapedshearwalls,thatis,thenorthandsouthspans.Inordertoreducethedrillingandblastingworkload,theintermediatepre-treatmentcanformfourrowsofload-bearingcolumnswithT-shapedends,whichbecomethemainbearingofthemainbuilding.Thecomponentisthendrilledandblasted. Thethreeprinciplesofshearwallpre-cuttingare:1)theprincipleofensuringthesafetyandstabilityofthebuildingbeforeexplosion;2)theprincipleofretainingtheshearwallnode;3)theprincipleofnormalizingthepost-bodyshearwallcolumn.   3.3drillingandblastingparameters   ThebuildingtobeexplodedismainlycarriedbytheI-shapedshearwall.Theblastholesontheshearwallarearrangedintwoways,namelyverticalshallowholes.Inordertoensuretheblastingeffect,theflyingstoneiscontrolled,andthelongitudinaldrillingparalleltotheshearwallisdecided..   Calculationofblastingparameters:theapertureф=38~40mm,theminimumresistancelineisl/2ofthethicknessoftheshearwall,ieW=O.125m,theholespacingδ=(1.5~2.0)W(m),takeδ=20~25cm,theholedepthListhewidthoftheshearwallwallminus25cm,ifthewallwidthexceeds1.5m,youcanentertheholefrombothsidesoftheshearwallsection. Attheelevatorshaft,themaximumholedepthontheshearwallis2.6m,andthecenterlineoftheblastholeisnotmorethan2cmparalleltotheshearwall. Atotalof1,720longitudinalholesarearrangedontheshearwallcolumn,whichisabout2095meters.   Thethin-wallstructureoftheshearwallis1000-1200g/m3forthebottomexplosive.Thesingle-explosionconsumptionofthetwo-layerexplosiveis800g/m3,andtheexplosiveconsumptionoftheuppertwoblastingshearwallsiscontrolledat600g/m3.   4Constructionprocess   4.1Deferredsegmentationanddetonationnetwork   Thenon-electricdetonatorsofMS2,HS2,HS3andHS4aredetonatedintheholeofthe1~4r
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Completiontime:June2004   ProjectLocation:WuningTown,DongyangCity,ZhejiangProvince   Completedunit:ZhejiangJinganBlastingEngineeringCo.,Ltd.   Projecthostandparticipants:WangXiaMing,ChengCailin,GuPing,DuZhonglong,HeHuawei   ContributedbyChengCailinandDuZhonglong     1ProjectOverview   TheWuningTownGovernmentBuildingofDongyangCityislocatedattheintersectionofRenminRoadandZhenxingRoadinDongyangCity,ZhejiangProvince.Theeastsideisabout18mawayfromRenminRoad,thesouthsideisabout50mawayfromZhenxingRoad,thenorthsideis25mfortheNationalLandBuilding,andthewestis9mforresidentialbuildings.   Thebuildingisdividedintotwoparts,themainbuildingandthepodium.Itfacessouthandisintheshapeofa“sail”. Themainbuildinghas19floorsintheeasthalfand2layersinthewesthalf.Thetotalheightis70.3mandthebuildingareaisaboutl1000m. . Themainbuildingisafullshearwallstructure,withthe"work"shapeshearwallasthemainload-bearingmember,thecontactbeamasthelapjointmember,theeast-westspanplustheelevatorshaftforthesevencolumns,thenorth-southspanplusthecorridorforthethree-span,thewestsideofthemainbuildingTherearedoubleelevatorshaftsandinnerstairs.Therearesingleelevatorshaftsandinnerstairsontheeastside.Theeastandwestsidesofthebuildingareasymmetricalinstructure;themainbuildingisafour-storypodiuminthesouth,northandwest,whichisaframestructure. ThesurroundingenvironmentofthebuildingisshowninFigure1.    2Characteristicsanddifficultiesofthedemolitionproject   (1)Thebuildingtobedemolishedisafullshearwallstructure.Duetotheasymmetricalstructureontheeastandwestsidesofthebuilding,theheightisdifferent,andthecenterofgravityiswestward.Therefore,theopeningstressoftheblastinggapisbalancedtoensuretheaccuracyofthedirectionaldumpingaftertheexplosion.   TheplanestructureofthebuildingisshowninFigure2.    (2)Thebuildingislocatedinthedowntownarea,andtherearemanybuildings(structures)tobeprotected.Itis9mfromthewestofthebuildingand45mfromthesouth.Thereareoverheadpowerlinesandcommunicationlinesonthesouthrevitalizationroad.55m;12montheeastsidehasavarietyofimportantpipelinefacilitiessuchasundergroundcommunicationcables,militaryopticalcables,undergroundcables,etc.,andthereareф600mmcementwatersupplypipesat17montheeastside.   (3)Becausetheconstructionperiodisonly20days,plustheconstructioniscatchingupwiththestudents'collegeentranceexaminationandthemiddleschoolentranceexaminationperiod,itisimpossibletoworkovertimeatnight,whichbringsgreatdifficultytotheconstructionprogress.   3Selectionofblastingdemolitionplan   Accordingtotheon-siteenvironmentalconditionsandthestructuralcharacteristicsofthebuilding,ablastingdemolitionschemewithmultiplegapstothesouthisused.   3.1Blastinggap   Themaximumnotchheightofthelowernotch,theformula:H=Btanф   IntheformulaB-thewidthofthebuilding,B=16.2m;ф-thenotchelevationangle,takeф=41°,tanф=0.87.   ThesurrogatevalueiscalculatedasH=14.1m.   Theheightofthetoppanelofthefourthfloorofthebuildingisjust14.1m,whichmeansthatthefrontrowcanbefrieduptothefourthfloor. Inordertomakethebuildingcollapsesmoothly,theheightoftheelevatorshaftandthestairwellisincreasedbyonelayerhigherthantheheightofthefrontrowofcolumns.   Twoauxiliarygapsareopenedinthe9thto10thfloorsand14thto15thfloorsofthebuilding.TheinternalI-shapedshearwallisalsopre-treatedanddrilledandblasted.TheblastinggapandtheholeareshowninFigure3.      3.2Pretreatmentofshearwall   Themainbuildingisdividedintofrontandreartwo-spanI-shapedshearwalls,thatis,thenorthandsouthspans.Inordertoreducethedrillingandblastingworkload,theintermediatepre-treatmentcanformfourrowsofload-bearingcolumnswithT-shapedends,whichbecomethemainbearingofthemainbuilding.Thecomponentisthendrilledandblasted. Thethreeprinciplesofshearwallpre-cuttingare:1)theprincipleofensuringthesafetyandstabilityofthebuildingbeforeexplosion;2)theprincipleofretainingtheshearwallnode;3)theprincipleofnormalizingthepost-bodyshearwallcolumn.   3.3drillingandblastingparameters   ThebuildingtobeexplodedismainlycarriedbytheI-shapedshearwall.Theblastholesontheshearwallarearrangedintwoways,namelyverticalshallowholes.Inordertoensuretheblastingeffect,theflyingstoneiscontrolled,andthelongitudinaldrillingparalleltotheshearwallisdecided..   Calculationofblastingparameters:theapertureф=38~40mm,theminimumresistancelineisl/2ofthethicknessoftheshearwall,ieW=O.125m,theholespacingδ=(1.5~2.0)W(m),takeδ=20~25cm,theholedepthListhewidthoftheshearwallwallminus25cm,ifthewallwidthexceeds1.5m,youcanentertheholefrombothsidesoftheshearwallsection. Attheelevatorshaft,themaximumholedepthontheshearwallis2.6m,andthecenterlineoftheblastholeisnotmorethan2cmparalleltotheshearwall. Atotalof1,720longitudinalholesarearrangedontheshearwallcolumn,whichisabout2095meters.   Thethin-wallstructureoftheshearwallis1000-1200g/m3forthebottomexplosive.Thesingle-explosionconsumptionofthetwo-layerexplosiveis800g/m3,andtheexplosiveconsumptionoftheuppertwoblastingshearwallsiscontrolledat600g/m3.   4Constructionprocess   4.1Deferredsegmentationanddetonationnetwork   Thenon-electricdetonatorsofMS2,HS2,HS3andHS4aredetonatedintheholeofthe1~4r
Demolition of reinforced concrete chimney
Demolition of reinforced concrete chimney
Time of issue : 2019-05-08 18:03:00
Completiontime:October1958   ProjectLocation:ShenyangCity   Completedby:NortheastInstituteofTechnology(nowNortheasternUniversity)   Projecthostandparticipants:LiuQingrong,MaYuhang   ContributedbyLiuQingrong   1ProjectOverview   ThechimneytobedemolishedislocatedinafactoryinShenyang. Theheightofthechimneyis50.5m,andthebarrelbodyisareinforcedconcretestructure.Theouterdiameteroftherootofthechimneycylinderis5.Omandthewallthicknessis0.3m.   Therearebuildingsaroundthechimney.Thenearestbuildingtothechimneyisthe10.8mbuildingonthesouthside,andthebuildingsinotherdirectionsare20~30mawayfromthechimney. Onlyazonewithanopenangleof30°inthenortheastcancollapse. Theprojectdecidedtousetheblastingmethodtoremoveit. TheexplosionzoneenvironmentisshowninFigure1.   2blastingdesign   2.1Blastinggapdesign   Theblastingnotchisexpandedinarectangularshape(Fig.2).   Thelengthofthegapis2/3ofthecircumferenceofthechimney. Theoutercircumferenceofthechimneyatthenotchis15.7m,thatis,thelengthofthenotchis10.5m. Theheightofthenotchiscalculatedas2to3timesthewallthicknessofthechimney,and0.5mistaken. Thebottomlineofthenotchislocatedat0.5mbelowthegroundplane.   2.2Holenetworkparameterdesign   Inordertofacilitatetheconstruction,theholeisdrilledinwardfromtheoutsideofthechimney.Thediameteroftheblastholeis38-40mm,andtheholedepthis2/3ofthewallthicknessofthechimneyatthenotch,thatis,0.2m. Theholespacingis0.3m,therowspacingis0.25m,andtherowsarestaggered.Atotalofthreerowsofholesarearranged,eachrowof34-35holes,atotalof104holes(Figure2).   2.3DosageandNetwork   TheNo.2rockammoniumnitrateexplosivewasusedforblasting.Thetestunitdeterminedthattheexplosiveconsumptionwas2kg/m3,thechargeperholewas45g,andthetotalchargewas4.68kg.   Inordertoreducetheimpactofblastingonthevibrationofsurroundingbuildings,aseconddelayelectricdetonatorisusedtodetonate. Theblastholeisdividedinto6sections,thenumberofblastingholesineachsectionis17-18,andtheexplosivequantityinasinglesectionis810g. Theseries-parallelelectricblastnetworkconnectionisused,thealternatingcurrentisdetonated,thedetonationvoltageis380V,andthecurrentobtainedbyeachdetonatorisgreaterthan4A.   3Security   (1)Themouthpartiscoveredandblockedwithawetstrawbagtoformthefirstflyingstonebarrier.   (2)2mfromtheperipheryofthechimney,afenceisformedbywoodenboardstoformasecondbarriertopreventthefragmentsfromscattering.   (3)Thedoorsandwindowsofthebuildingsnearthechimneyareallopenandfixedtopreventthedamageoftheshockwave.   (4)Allpersonnelareevacuatedto100m.   4blastingconstruction   (1)Drilling. Duringthedrillingconstruction,thegroundisdug1mdeepalongthebottomofthechimney,andthefirstrowofblastholesisarranged0.5mbelowtheground.   (2)Charge. Accordingtothedesignedsingle-holecharge,theexplosiveisweighedandplacedinapaperbagpreparedinadvance. Insertthedetonatorintothebagbeforeloadingandputitintotheblasthole,thenusetheclaytoblocktheblasthole.   (3)Testexplosion. Thechimneyhasalongservicelife,andthereisnodrawingtochecktheinternalstructureofthechimney.Inordertoverifythesizeofthesingleholechargeandthedistributionoftheprovensteelbar,thetestexplosionoccurredatthecenteroftheblastingnotchandburst0.5mx0.6m.Thegapdeterminesthesingle-holecharge;toweakenthesupportoftheverticalreinforcementtothechimney,themainribexposedbythenotchiscutoff(thecalculationofwhetherthemainribisunstablewhenthenotchisformed).   5blastingeffect   Aftertheexplosivesdetonated,agapwasformedatthebottomofthechimney,andthechimneylostitsbalanceandslowlyfelltothenortheast. Theactualdumpcenterlinecoincideswiththedesigndumpcenterline. Afterthechimneytouchestheground,mostofthesimplifiedbodyisbrokenandthedebrisiseasytoremove. Thebuildingsandpipesnearthechimneyaresafeandtheglasswindowsarenotdamaged. ThisisthefirstblastingdemolitionofachimneybyablastingmethodinChina.
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Completiontime:October1958   ProjectLocation:ShenyangCity   Completedby:NortheastInstituteofTechnology(nowNortheasternUniversity)   Projecthostandparticipants:LiuQingrong,MaYuhang   ContributedbyLiuQingrong   1ProjectOverview   ThechimneytobedemolishedislocatedinafactoryinShenyang. Theheightofthechimneyis50.5m,andthebarrelbodyisareinforcedconcretestructure.Theouterdiameteroftherootofthechimneycylinderis5.Omandthewallthicknessis0.3m.   Therearebuildingsaroundthechimney.Thenearestbuildingtothechimneyisthe10.8mbuildingonthesouthside,andthebuildingsinotherdirectionsare20~30mawayfromthechimney. Onlyazonewithanopenangleof30°inthenortheastcancollapse. Theprojectdecidedtousetheblastingmethodtoremoveit. TheexplosionzoneenvironmentisshowninFigure1.   2blastingdesign   2.1Blastinggapdesign   Theblastingnotchisexpandedinarectangularshape(Fig.2).   Thelengthofthegapis2/3ofthecircumferenceofthechimney. Theoutercircumferenceofthechimneyatthenotchis15.7m,thatis,thelengthofthenotchis10.5m. Theheightofthenotchiscalculatedas2to3timesthewallthicknessofthechimney,and0.5mistaken. Thebottomlineofthenotchislocatedat0.5mbelowthegroundplane.   2.2Holenetworkparameterdesign   Inordertofacilitatetheconstruction,theholeisdrilledinwardfromtheoutsideofthechimney.Thediameteroftheblastholeis38-40mm,andtheholedepthis2/3ofthewallthicknessofthechimneyatthenotch,thatis,0.2m. Theholespacingis0.3m,therowspacingis0.25m,andtherowsarestaggered.Atotalofthreerowsofholesarearranged,eachrowof34-35holes,atotalof104holes(Figure2).   2.3DosageandNetwork   TheNo.2rockammoniumnitrateexplosivewasusedforblasting.Thetestunitdeterminedthattheexplosiveconsumptionwas2kg/m3,thechargeperholewas45g,andthetotalchargewas4.68kg.   Inordertoreducetheimpactofblastingonthevibrationofsurroundingbuildings,aseconddelayelectricdetonatorisusedtodetonate. Theblastholeisdividedinto6sections,thenumberofblastingholesineachsectionis17-18,andtheexplosivequantityinasinglesectionis810g. Theseries-parallelelectricblastnetworkconnectionisused,thealternatingcurrentisdetonated,thedetonationvoltageis380V,andthecurrentobtainedbyeachdetonatorisgreaterthan4A.   3Security   (1)Themouthpartiscoveredandblockedwithawetstrawbagtoformthefirstflyingstonebarrier.   (2)2mfromtheperipheryofthechimney,afenceisformedbywoodenboardstoformasecondbarriertopreventthefragmentsfromscattering.   (3)Thedoorsandwindowsofthebuildingsnearthechimneyareallopenandfixedtopreventthedamageoftheshockwave.   (4)Allpersonnelareevacuatedto100m.   4blastingconstruction   (1)Drilling. Duringthedrillingconstruction,thegroundisdug1mdeepalongthebottomofthechimney,andthefirstrowofblastholesisarranged0.5mbelowtheground.   (2)Charge. Accordingtothedesignedsingle-holecharge,theexplosiveisweighedandplacedinapaperbagpreparedinadvance. Insertthedetonatorintothebagbeforeloadingandputitintotheblasthole,thenusetheclaytoblocktheblasthole.   (3)Testexplosion. Thechimneyhasalongservicelife,andthereisnodrawingtochecktheinternalstructureofthechimney.Inordertoverifythesizeofthesingleholechargeandthedistributionoftheprovensteelbar,thetestexplosionoccurredatthecenteroftheblastingnotchandburst0.5mx0.6m.Thegapdeterminesthesingle-holecharge;toweakenthesupportoftheverticalreinforcementtothechimney,themainribexposedbythenotchiscutoff(thecalculationofwhetherthemainribisunstablewhenthenotchisformed).   5blastingeffect   Aftertheexplosivesdetonated,agapwasformedatthebottomofthechimney,andthechimneylostitsbalanceandslowlyfelltothenortheast. Theactualdumpcenterlinecoincideswiththedesigndumpcenterline. Afterthechimneytouchestheground,mostofthesimplifiedbodyisbrokenandthedebrisiseasytoremove. Thebuildingsandpipesnearthechimneyaresafeandtheglasswindowsarenotdamaged. ThisisthefirstblastingdemolitionofachimneybyablastingmethodinChina.
Demolition of Cooling Tower of Datang Taiyuan Second Thermal Power Plant
Demolition of Cooling Tower of Datang Taiyuan Second Thermal Power Plant
Completiontime:2004-2005   ProjectLocation:Taiyuan,Shanxi   Completionunit:ChinaRailwayThirdBureauGroupCorporation   Projecthostandparticipants:ZiLigang,LiuHonggang,ZhangJunbing,XuJianzhong   Writer:BaiLigang   1ProjectOverview   TheDatangTaiyuanNo.2ThermalPowerPlantwasbuiltin1958.TheNo.1toNo.4generatingunitshaveexceededtheservicelife.Theownersdecidedtorenovatetheoverdueserviceunitsandsomeequipmentandbuildings.TheNo.1,No.2,No.3coolingisrequired.tower. Becausethecoolingtoweristallandthin-walledreinforcedconcretestructure,itcannotbemanuallyremoved,soitisdecidedtousedirectionalcontrolblastingtechnologyfordemolitionconstruction.   Amongthem,thecoolingtowerNo.3isareinforcedconcretestructure,andthestructureofthehyperboliccylinderisshowninFig.1. Thetowerhasaheightof70.15m,abottomradiusof29.57m,anupperradiusof14.7m,abottomwallthicknessofδ=400mm,andatopwallthicknessofδ=100mm. Thetowerbodyislocatedon40pairsofherringbonepillarreinforcedconcretetrusses,andthepillarsectionisa40mm×40mmrectangularstructure. Thetotalamountofreinforcedconcreteinthecoolingtoweris1085.2m3andthetotalweightis2658t.ItisthehighestheightandlargestdiametercoolingtowercurrentlyremovedbyblastingmethodsinChina.    Somebuildingsaroundthecoolingtowerneedtoberemoved. However,theclosestdistanceofCoolingTowerNo.3tothenewly-builtofficebuildingofthekeyprotectionbuildingis24.067m,28.962mfromthebrickhouseand35.866mfromtheswimmingpool(seeFigure2).     2blastingplanselection   2.1Engineeringcharacteristicsanddesignrequirements   (1)Thesurroundingenvironmentiscomplexandthedirectionofcollapsemustbestrictlycontrolled.   (2)Thebottomofthecoolingtowerhasalargediameterandasmallheightratio(1.18).Whenblasting,itshouldpreventthephenomenonofsittingwithoutfalling,fallingwithoutbreakingandexplodingtoohigh.   (3)Thecoolingtowerisathin-walledstructurewithalargenumberofholes,itisdifficulttofillthecharge,anditiseasytoproduceflyingstones.Itisnecessarytostrengthentheprotection.   (4)Thedetonationnetworkiscomplex,anditisadvisabletouseanon-electricmilliseconddelaydetonationtechnologyoramulti-channelfour-wayrelaynetwork.   (5)Controltheamountofsingle-shotdrugstoensurethattheblastingvibrationdoesnotcauseanyharmtotheofficebuilding,andattentionshouldbepaidtotheimpactofthefloor-standingvibrationofthetowerbody.   2.2Blastingdemolitionplan   Theblastingiscontrolledby“openingthewindow,breakingthesteelbar,andretainingthesupportingplate”,thenusingthehydraulicbreakertobreak,theexcavator(orloader)tobeshipped,andthecartotheslagplantformechanizedconstruction.   2.3Determinationofcollapsedirection   Sincethecoolingtowerstructureissymmetricallyarrangedalongtheperiphery,thestructureitselfhasnoinfluenceonthecollapsedirection,andthecollapsedirectionismainlydeterminedaccordingtothesurroundingenvironmentalconditions. SincetherightsideoftheNo.3coolingtowerisanofficebuilding,abrickhouseandapool,bothareprotectedbuildings,andthecoolingtowerisdesignedtocollapseinthedirectionofthenorth.   3Determinationofblastingparameters   3.1Designofblastinggap   3.1.1Notchdesignprinciples   Thesize,heightandpositionoftheblastingholeareimportantconditionsforthecoolingtowertocollapsesmoothlyaccordingtothedesigndirection.Therefore,itshouldbedesignedaccordingtothefollowingprinciples:   (1)Thesizeofthegapshouldmeettherequirementsofthetowerbodytocollapseundertheactionofgravityaftertheblasting.   (2)Thegapmustensurethatthecoolingtowerbodyisfullygroundafterblasting,thatis,collapsedratherthancollapsed.   (3)Thesmallamountofthegapitselfcanbecreated,andgoodprotectionconditionscanbecreated.Afterthetowerbodyisgrounded,thecrushingeffectisgood,andthetowerbodyhasalowstackingheighttofacilitatethecleaningoftheslag.   3.1.2gapsizeselection   (1)Gapform:adopta"trapezoid"gap;   (2)Notchheight(H):equaltotheheightoftheherringbonepillar(h1),theheightofthepillarring(h2),andtheheightofthetowergap(h3),thetotalheightisabout8m;H=h1+h2+h3,seethefigure3.  (Note:theshadedpartinthefigureisthepre-removedpart,whichisgenerallypre-dismantledwithabreaker; Eachreservedsupportblockisnotlessthan3.0m. ;thepillarringonlycutsthreegaps)   (3)Notchlength:accordingtothedifferentcomponentsofthenotch,takedifferentlengths,whereinthelengthoftheherringbonepillarisL1=1/2S,thelengthofthepillarringisL2=220/360s,andthelengthofthetowerbodyisL3=230/360s.MediumSistheperimeterofthetower.   3.2Blastingparameters   TheblastingparametersareshowninTable1.  Note:Theparametersinthetablevarywiththewallthicknessofthetower.   4detonatingnetwork   Becausethecoolingtowerhaslargeblastingsurfaceandmanyholes,itisthekeytothesuccessofblasting.Itisthekeytothesuccessorfailureoftheblasting.Iftheelectricblastingnetworkisused,thenumberoftheblastingnetworkistoolarge.Theblastdecisionwasmadeusingamulti-channelfour-waynetwork. Eachcolumnpillarringgapisusedasaunitbody,and8to12holesineachunitbodyareconnectedintoindependentunitbodiesby2roundsofmilliseconddetonators,andeachindependentunitbodyisconnectedbyamulti-channelfour-waynetwork,eachTheunitbodyconsistsof4to8channels,ensuringthatallthemedicinepacksarerel
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Completiontime:2004-2005   ProjectLocation:Taiyuan,Shanxi   Completionunit:ChinaRailwayThirdBureauGroupCorporation   Projecthostandparticipants:ZiLigang,LiuHonggang,ZhangJunbing,XuJianzhong   Writer:BaiLigang   1ProjectOverview   TheDatangTaiyuanNo.2ThermalPowerPlantwasbuiltin1958.TheNo.1toNo.4generatingunitshaveexceededtheservicelife.Theownersdecidedtorenovatetheoverdueserviceunitsandsomeequipmentandbuildings.TheNo.1,No.2,No.3coolingisrequired.tower. Becausethecoolingtoweristallandthin-walledreinforcedconcretestructure,itcannotbemanuallyremoved,soitisdecidedtousedirectionalcontrolblastingtechnologyfordemolitionconstruction.   Amongthem,thecoolingtowerNo.3isareinforcedconcretestructure,andthestructureofthehyperboliccylinderisshowninFig.1. Thetowerhasaheightof70.15m,abottomradiusof29.57m,anupperradiusof14.7m,abottomwallthicknessofδ=400mm,andatopwallthicknessofδ=100mm. Thetowerbodyislocatedon40pairsofherringbonepillarreinforcedconcretetrusses,andthepillarsectionisa40mm×40mmrectangularstructure. Thetotalamountofreinforcedconcreteinthecoolingtoweris1085.2m3andthetotalweightis2658t.ItisthehighestheightandlargestdiametercoolingtowercurrentlyremovedbyblastingmethodsinChina.    Somebuildingsaroundthecoolingtowerneedtoberemoved. However,theclosestdistanceofCoolingTowerNo.3tothenewly-builtofficebuildingofthekeyprotectionbuildingis24.067m,28.962mfromthebrickhouseand35.866mfromtheswimmingpool(seeFigure2).     2blastingplanselection   2.1Engineeringcharacteristicsanddesignrequirements   (1)Thesurroundingenvironmentiscomplexandthedirectionofcollapsemustbestrictlycontrolled.   (2)Thebottomofthecoolingtowerhasalargediameterandasmallheightratio(1.18).Whenblasting,itshouldpreventthephenomenonofsittingwithoutfalling,fallingwithoutbreakingandexplodingtoohigh.   (3)Thecoolingtowerisathin-walledstructurewithalargenumberofholes,itisdifficulttofillthecharge,anditiseasytoproduceflyingstones.Itisnecessarytostrengthentheprotection.   (4)Thedetonationnetworkiscomplex,anditisadvisabletouseanon-electricmilliseconddelaydetonationtechnologyoramulti-channelfour-wayrelaynetwork.   (5)Controltheamountofsingle-shotdrugstoensurethattheblastingvibrationdoesnotcauseanyharmtotheofficebuilding,andattentionshouldbepaidtotheimpactofthefloor-standingvibrationofthetowerbody.   2.2Blastingdemolitionplan   Theblastingiscontrolledby“openingthewindow,breakingthesteelbar,andretainingthesupportingplate”,thenusingthehydraulicbreakertobreak,theexcavator(orloader)tobeshipped,andthecartotheslagplantformechanizedconstruction.   2.3Determinationofcollapsedirection   Sincethecoolingtowerstructureissymmetricallyarrangedalongtheperiphery,thestructureitselfhasnoinfluenceonthecollapsedirection,andthecollapsedirectionismainlydeterminedaccordingtothesurroundingenvironmentalconditions. SincetherightsideoftheNo.3coolingtowerisanofficebuilding,abrickhouseandapool,bothareprotectedbuildings,andthecoolingtowerisdesignedtocollapseinthedirectionofthenorth.   3Determinationofblastingparameters   3.1Designofblastinggap   3.1.1Notchdesignprinciples   Thesize,heightandpositionoftheblastingholeareimportantconditionsforthecoolingtowertocollapsesmoothlyaccordingtothedesigndirection.Therefore,itshouldbedesignedaccordingtothefollowingprinciples:   (1)Thesizeofthegapshouldmeettherequirementsofthetowerbodytocollapseundertheactionofgravityaftertheblasting.   (2)Thegapmustensurethatthecoolingtowerbodyisfullygroundafterblasting,thatis,collapsedratherthancollapsed.   (3)Thesmallamountofthegapitselfcanbecreated,andgoodprotectionconditionscanbecreated.Afterthetowerbodyisgrounded,thecrushingeffectisgood,andthetowerbodyhasalowstackingheighttofacilitatethecleaningoftheslag.   3.1.2gapsizeselection   (1)Gapform:adopta"trapezoid"gap;   (2)Notchheight(H):equaltotheheightoftheherringbonepillar(h1),theheightofthepillarring(h2),andtheheightofthetowergap(h3),thetotalheightisabout8m;H=h1+h2+h3,seethefigure3.  (Note:theshadedpartinthefigureisthepre-removedpart,whichisgenerallypre-dismantledwithabreaker; Eachreservedsupportblockisnotlessthan3.0m. ;thepillarringonlycutsthreegaps)   (3)Notchlength:accordingtothedifferentcomponentsofthenotch,takedifferentlengths,whereinthelengthoftheherringbonepillarisL1=1/2S,thelengthofthepillarringisL2=220/360s,andthelengthofthetowerbodyisL3=230/360s.MediumSistheperimeterofthetower.   3.2Blastingparameters   TheblastingparametersareshowninTable1.  Note:Theparametersinthetablevarywiththewallthicknessofthetower.   4detonatingnetwork   Becausethecoolingtowerhaslargeblastingsurfaceandmanyholes,itisthekeytothesuccessofblasting.Itisthekeytothesuccessorfailureoftheblasting.Iftheelectricblastingnetworkisused,thenumberoftheblastingnetworkistoolarge.Theblastdecisionwasmadeusingamulti-channelfour-waynetwork. Eachcolumnpillarringgapisusedasaunitbody,and8to12holesineachunitbodyareconnectedintoindependentunitbodiesby2roundsofmilliseconddetonators,andeachindependentunitbodyisconnectedbyamulti-channelfour-waynetwork,eachTheunitbodyconsistsof4to8channels,ensuringthatallthemedicinepacksarerel
Large-scale blasting of cluster holes under complex conditions of underground mines
Large-scale blasting of cluster holes under complex conditions of underground mines
Completiontime:March2005   ProjectLocation:NantongDantongkengMine   Completionunit:BeijingMiningandMetallurgicalResearchInstitute,HuaxiGroupTongkengMine   Projecthostandparticipants:SunZhongming,ZhangYoubao,LiShiqing,ChenHe,SuJiahong,YaoGenhua,YuZiqing,LiuJiandong,PanJiaxu,WuGuicai,LuoXianwei,YuBin,YuYangxian,WeiFangjing,YangWeizhong,CaiHanqian,WangHuxin,DongWeijun,ZengLunsheng,MoRongshi,XiaHailiang,WenYanyu,LiuMenghong,YuanXiangquan,XieYuan,WeiKeli,WuZengqiang   ContributedbySunZhongming   In2002,theGuangxiAcademicianBankorganizedbytheChineseAcademyofEngineeringandtheNationalDevelopmentandReformCommissionheldaspecialdiscussionontheissueofthehiddendangersoftheTongkengMine.ItclearlypointedouttheurgencyandpossibletreatmentofthehiddendangersoftheTongkengMine.Technicalapproach. Basedonthis,theBeijingResearchInstituteofMiningandMetallurgyandHuaxiGroupcooperatedonMarch28,2005toconductalarge-scaleundergroundblastingwithachargeof150tattheDantongkengMineinsouthwestGuangxi. Thislargeblastingisakeyprojectforthenationalkeysafetyhazardremediationproject,thehiddendangermanagementofTongkengMine,andtheundergroundblastingofthelargestblastingvolumeinChina.   HuaxiGroupCopperPitMineisalargeundergroundminewithamininghistoryofmorethan30years. Thethreemajororebodiesminedarethefineveinbelts,theNo.91andNo.92orebodiesfromtoptobottom,andthethreeorebodiesarepartiallyoverlappedintheverticaldirection. Theearliestminedfineveinbeltorebodyspontaneouslyignitedsince1976,formingafirezonethatcannotbecured,causingdisorderofthesubsequentminingsequence,leavingaconsiderablenumberofirregularlydistributedemptyareas. Withthedevelopmentofmineproductionandconstruction,themainminingareaof​​theminehasgraduallyshiftedtothelowerNo.92orebody,formingagroupofupperandloweremptyareas,anditismoredifficulttocontrolthegroundpressureofthemine. Since1998,localcollapseofthestopeandmovementoftherockformationoccurred,andthenlocalizedcollapsebegantooccur.Atthesametime,thefirebarriercolumnleftinordertoensurethesafetyofthelowerminingareahasbeeninanincompletestate,controllingthespreadofthefirezoneandpreventingit.Thedifficultyofgroundpressuredisastersisgettingbiggerandbigger,andtheremaining3.6milliontonsoforeintheveinsoftheveinscannotberecovered. Theminingoperationsofthelower92orebodyaredirectlythreatened. In1997,itwaslistedasahiddendangerareaformajoraccidentsinGuangxi.In2002,itwaslistedasanationalkeysafetyhazardremediationproject.   Inordertocurethehiddendangersandpressuredisastersinthefireareaandrecovertheoreresources,HuaxiGroupadherestotheprincipleof“preventionfirstandsafetyfirst”,intheStateAdministrationofWorkSafetyandtheSafetyProductionSupervisionAdministrationofGuangxiZhuangAutonomousRegion.Undertheguidance,wewillactivelycarryoutthemanagementofthehiddendangerzoneofthefineveins. TheBeijingResearchInstituteofMiningandMetallurgyisalarge-scalenationalcomprehensiveresearchinstitute.Ithascarriedoutlong-termsystematicworkinthedevelopmentandresearchofminingengineeringtechnology,andmanyresearchresultshavereachedtheinternationaladvancedlevel. Inparticular,ithasrichengineeringpracticeexperienceandinnovativetechnologyinhigh-efficiencyminingtechnologyandlarge-scaleblastingtechnology. InOctober2003,HuaxiGroupandtheBeijingResearchInstituteofMiningandMetallurgyjointlycooperatedtostartascientificandtechnologicalresearchprojectforthespecifictreatmentofcopperpitminesandrelatedtechnologies. Since2003,theBeijingResearchInstituteofMiningandMetallurgyhascooperatedwiththeHuaxiGroupTongkengMine.Aftermanyinvestigations,analysisandargumentation,ithasdecidedtoadoptapartialfilling,forcedcollapse,strongminingandstrongout,closedcoveragecomprehensivetreatmentplan,andscopeoftreatment.Itisdividedintothreeexplosionzonesandblastingiscarriedoutinstages.   Thefirstexplosionzoneislocatedatthelevelof570mto650minthefineveinzone,includingthelarge14thand12thstopesandtheircorrespondingupperfirebarriers. Duetoalargenumberofirregularvacancies,ballastdamageandadjacentfirezonesandotherfactorscausedbyquitecomplexblastingconditionsandenvironment,forthedifferentpillarconditions,thefirstblastzoneadoptsdifferentstagesofphasebundlessuchaslinear,circularandsquare.Thedensedeepholeismainlycomposed,andtheblastingschemeofthelocalmedium-deepholeandsmalldiverticulumissupplementedtorealizetheoverallcollapseoftherockarea.   Theblastingresistancelineofthebundleholeis5to14m. Thebeamholeblastingtechnologyhasthefeasibilityandapplicabilityunderspecialprocessconditions. Technicallyreliable,highefficiencyandhighstrength. Thelargeblastingdesignestablishestheblastingvibrationattenuationmodelandthedownholeshockwavepropagationattenuationmodeltoaccuratelypredicttheharmfuleffectsofblasting. Thepre-crackingvibrationreduction,flexiblewaveblockingwall,real-timemonitoringandothertechnicalmeansareusedtoeffectivelycontroltheharmfuleffectsofblasting.   Theblastingrockchamberislocatedintheoriginalminingapproachoronbothsides,4mhigh. Thebeamholehasadepthof30to62mandisverticallyparalleltothehole. Thenumberofbundleholesis3to9. Holenetparameters:beamspac
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Completiontime:March2005   ProjectLocation:NantongDantongkengMine   Completionunit:BeijingMiningandMetallurgicalResearchInstitute,HuaxiGroupTongkengMine   Projecthostandparticipants:SunZhongming,ZhangYoubao,LiShiqing,ChenHe,SuJiahong,YaoGenhua,YuZiqing,LiuJiandong,PanJiaxu,WuGuicai,LuoXianwei,YuBin,YuYangxian,WeiFangjing,YangWeizhong,CaiHanqian,WangHuxin,DongWeijun,ZengLunsheng,MoRongshi,XiaHailiang,WenYanyu,LiuMenghong,YuanXiangquan,XieYuan,WeiKeli,WuZengqiang   ContributedbySunZhongming   In2002,theGuangxiAcademicianBankorganizedbytheChineseAcademyofEngineeringandtheNationalDevelopmentandReformCommissionheldaspecialdiscussionontheissueofthehiddendangersoftheTongkengMine.ItclearlypointedouttheurgencyandpossibletreatmentofthehiddendangersoftheTongkengMine.Technicalapproach. Basedonthis,theBeijingResearchInstituteofMiningandMetallurgyandHuaxiGroupcooperatedonMarch28,2005toconductalarge-scaleundergroundblastingwithachargeof150tattheDantongkengMineinsouthwestGuangxi. Thislargeblastingisakeyprojectforthenationalkeysafetyhazardremediationproject,thehiddendangermanagementofTongkengMine,andtheundergroundblastingofthelargestblastingvolumeinChina.   HuaxiGroupCopperPitMineisalargeundergroundminewithamininghistoryofmorethan30years. Thethreemajororebodiesminedarethefineveinbelts,theNo.91andNo.92orebodiesfromtoptobottom,andthethreeorebodiesarepartiallyoverlappedintheverticaldirection. Theearliestminedfineveinbeltorebodyspontaneouslyignitedsince1976,formingafirezonethatcannotbecured,causingdisorderofthesubsequentminingsequence,leavingaconsiderablenumberofirregularlydistributedemptyareas. Withthedevelopmentofmineproductionandconstruction,themainminingareaof​​theminehasgraduallyshiftedtothelowerNo.92orebody,formingagroupofupperandloweremptyareas,anditismoredifficulttocontrolthegroundpressureofthemine. Since1998,localcollapseofthestopeandmovementoftherockformationoccurred,andthenlocalizedcollapsebegantooccur.Atthesametime,thefirebarriercolumnleftinordertoensurethesafetyofthelowerminingareahasbeeninanincompletestate,controllingthespreadofthefirezoneandpreventingit.Thedifficultyofgroundpressuredisastersisgettingbiggerandbigger,andtheremaining3.6milliontonsoforeintheveinsoftheveinscannotberecovered. Theminingoperationsofthelower92orebodyaredirectlythreatened. In1997,itwaslistedasahiddendangerareaformajoraccidentsinGuangxi.In2002,itwaslistedasanationalkeysafetyhazardremediationproject.   Inordertocurethehiddendangersandpressuredisastersinthefireareaandrecovertheoreresources,HuaxiGroupadherestotheprincipleof“preventionfirstandsafetyfirst”,intheStateAdministrationofWorkSafetyandtheSafetyProductionSupervisionAdministrationofGuangxiZhuangAutonomousRegion.Undertheguidance,wewillactivelycarryoutthemanagementofthehiddendangerzoneofthefineveins. TheBeijingResearchInstituteofMiningandMetallurgyisalarge-scalenationalcomprehensiveresearchinstitute.Ithascarriedoutlong-termsystematicworkinthedevelopmentandresearchofminingengineeringtechnology,andmanyresearchresultshavereachedtheinternationaladvancedlevel. Inparticular,ithasrichengineeringpracticeexperienceandinnovativetechnologyinhigh-efficiencyminingtechnologyandlarge-scaleblastingtechnology. InOctober2003,HuaxiGroupandtheBeijingResearchInstituteofMiningandMetallurgyjointlycooperatedtostartascientificandtechnologicalresearchprojectforthespecifictreatmentofcopperpitminesandrelatedtechnologies. Since2003,theBeijingResearchInstituteofMiningandMetallurgyhascooperatedwiththeHuaxiGroupTongkengMine.Aftermanyinvestigations,analysisandargumentation,ithasdecidedtoadoptapartialfilling,forcedcollapse,strongminingandstrongout,closedcoveragecomprehensivetreatmentplan,andscopeoftreatment.Itisdividedintothreeexplosionzonesandblastingiscarriedoutinstages.   Thefirstexplosionzoneislocatedatthelevelof570mto650minthefineveinzone,includingthelarge14thand12thstopesandtheircorrespondingupperfirebarriers. Duetoalargenumberofirregularvacancies,ballastdamageandadjacentfirezonesandotherfactorscausedbyquitecomplexblastingconditionsandenvironment,forthedifferentpillarconditions,thefirstblastzoneadoptsdifferentstagesofphasebundlessuchaslinear,circularandsquare.Thedensedeepholeismainlycomposed,andtheblastingschemeofthelocalmedium-deepholeandsmalldiverticulumissupplementedtorealizetheoverallcollapseoftherockarea.   Theblastingresistancelineofthebundleholeis5to14m. Thebeamholeblastingtechnologyhasthefeasibilityandapplicabilityunderspecialprocessconditions. Technicallyreliable,highefficiencyandhighstrength. Thelargeblastingdesignestablishestheblastingvibrationattenuationmodelandthedownholeshockwavepropagationattenuationmodeltoaccuratelypredicttheharmfuleffectsofblasting. Thepre-crackingvibrationreduction,flexiblewaveblockingwall,real-timemonitoringandothertechnicalmeansareusedtoeffectivelycontroltheharmfuleffectsofblasting.   Theblastingrockchamberislocatedintheoriginalminingapproachoronbothsides,4mhigh. Thebeamholehasadepthof30to62mandisverticallyparalleltothehole. Thenumberofbundleholesis3to9. Holenetparameters:beamspac
Chamber blasting of limestone orphans
Chamber blasting of limestone orphans
Time of issue : 2019-05-08 17:46:00
Completiontime:April2004   ProjectLocation:MaweiTownship,DebaoCounty,Guangxi   Completedunit:GuangxiGeologyConstructionEngineeringDevelopmentCenter   Projecthostandparticipants:ZhaoMingte,TanZhimin,QiJingyin,WangHong   ContributedbyZhaoMingte   1ProjectOverview   1.1Engineeringandgeologicaloverview   InordertodeveloptheGuangxiBauxiteMine,GuangxiHuayinAluminumCo.,Ltd.decidedtobuildanaluminaplantinMajiTownship,DebaoCounty,Guangxi.Accordingtotheoverallarrangementoftheprojectconstruction,theownerrequestedwithinonemonth(ieMarch18to4,2004).Onthe18thofthemonth,theblastingtaskofeightlimestoneorphanchambersintheplantareawascompleted.   1.2Topographyandgeologyinthedetonationarea   Thefourlimestonemountainsinthealuminumplantsitearetoweringandsteeplonepeaks.Theslopeanglesoftheslopesareallgreaterthan45°.Mostofthesurfaceofthemountainisexposedlimestone,withscatteredlocalvegetationandlithologyfromthicktothickthicklimestone.Thelithologyisrelativelyhard,f=7~lO,therockstratumis165/NE,therocklayerdipis27°,thesurfaceoftherockmassisweaklyweathered,thejointfissuresaredeveloped,andthesolitarypeaksarealldevelopedwithcaves,theirsizesaredifferent,andtheshapeisirregular.Mostofthemdevelopinthemiddleandlowerpartsofthemountain,andthereisnowaterinthehole. Therearetwogroupsoffault-fracturezonesneartheeast-westdirection,withawidthofl~3m.Thefracturedzoneofthefaultfracturezoneextendsfromthetoptothefootofthemountain. Thefaultzoneisakeratinousweaksilicifiedrock.   No.2is430mlong,220mwideand63.1mhigh,withablastingcapacityof380,000m3;No.3isolatedpeakis240mlong,200mwide,72.92mhigh,withablastingcapacityof250,000m3;No.4isolatedpeakis280mlongandwide120m,height52m,blastingquantity90,000m3;No.8solitarypeaklength260m,width110m,height45.2m,blastingquantity110,000m3.4solitarypeaksrequireblastingfloorelevation690m,totalblastingcapacityis83Millionm3.   1.3Thesurroundingenvironmentoftheexplosionarea   Theblastzoneisatypicalkarstlandform,whichisarelativelyflatdepression.Itissurroundedbyundulatingpeakclusters.Fourorphanpeaksarelocatedinthecenterofthevalley.Theyaredistributedinashapeofafigure,amongwhicharethe3rd,4thand2ndpeaks.Thedistanceis60-80m,the8thisolatedpeakisfarapart,andthedistancebetweenthe4thpeakis500m. Therearevillagesaroundthefourisolatedpeaks.Thenearestdistancetothevillageis80m(multipleobjects),andtherestareabove200-250m.Inadditiontotheresidentialareas,therearehigh-voltagelinesandcommunicationstations.(structure)andfacilities,thedistancefromtheexplosionzoneisabout400~500m(asshowninFigure1).    1.4Technicalrequirementsforblastingdesign   GuangxiHuayinAluminumCo.,Ltd.putsforwardthefollowingrequirementsforthedesignofchamberblastingtechnology:   (1)Blastingelevation:allbrokenabove690melevation.   (2)Therockmassafterblastingislessthan300mm,accountingfor60%;300-600mmormore,30%;600mmormore,accountingfor10%.   (3)Projectduration:March18toApril18,atotalof30days.   (4)Noharmtothehousesandotherfacilitiesaroundtheexplosionarea.   2blastingdesign   2.1Blastingplan   Thepurposeofthisblastingistoflatten4orphanpeaks,andtheblastingfragmentshavegradingrequirements.Theenergydistributionofthestrip-shapeddrugroomisuniform,andtheblockandgradingcontrolisbetter.Atthesametime,thelowerpartofthefourisolatedpeaksareconsidered.Thethicklayerandthethicklayeroflimestone,withthemiddlelayeroflimestoneinterposedtherebetween,sotheconcentratedchamberblastingisusedinthethicklayersection,andtheblastingschemecombiningthestripmedicinechamberandtheconcentratedmedicinechamberisgenerallyadopted. Inordertoeffectivelyprotectthebuilding(structure)aroundtheexplosionarea,thedrugroomisarrangedinlayers,theupperdrugroomisdesignedtostrengthenthelooseblasting,thelowerdrugroomislooseblasting,andtheminimumresistancelineiscontrolledwithin20m. Thedetonatingtubeisusedtodetonatethenetwork. Theblastingschemesofthefoursolitarypeaksareasfollows:   (1)No.2orphanpeakiselliptical,withlittlechangeintopography.Themiddleandupperpartsaremedium-thicklayeredlimestone,andthelowerpartisthicktothickthicklayeredlimestone.Twolayersofdrugroomarearranged,andtheupperlayerisstrip-shapedmedicine.Theroomisreinforcedbylooseblasting,andthelowerlayerislooseblastingofconcentrateddrugroom.   (2)TheNo.3orphanpeakisanearlyverticalcylindricalpeak,andthelithologyisamediumthicklayeredlimestone.Threelayersofdrugchambersarearranged.Theuppertwolayersofthedrugchamberarestrip-shapeddrugchambers,whicharecollapsedandblasted.Concentrateddrugroomlooseningblasting.   (3)The4thpeakissimilartothetiger-likeshape.Thefirst(southend)isamedium-thicklayeredlimestone,thelowerpartandthenorthpartarethickandthickthicklayeredlimestone,thesouthissetupwithtwolayersofmedicinerooms,andthenorthissetwithalayerofmedicine.Room,usingconcentrateddrugroomlooseblasting.   (4)No.8orphanpeakissimilartodiamondshape,lithologyismediumthicklayeredlimestone,80monthenorthwestsideofthemountainismulti-objective,mostofthehousesaremudbrickstructure,twolayersofdrugroomarearranged,andthestrip-shapeddrugroomisloosened.blasting.   2.2Designprinciples   Thechamberblastingperiodistight,thesu
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Completiontime:April2004   ProjectLocation:MaweiTownship,DebaoCounty,Guangxi   Completedunit:GuangxiGeologyConstructionEngineeringDevelopmentCenter   Projecthostandparticipants:ZhaoMingte,TanZhimin,QiJingyin,WangHong   ContributedbyZhaoMingte   1ProjectOverview   1.1Engineeringandgeologicaloverview   InordertodeveloptheGuangxiBauxiteMine,GuangxiHuayinAluminumCo.,Ltd.decidedtobuildanaluminaplantinMajiTownship,DebaoCounty,Guangxi.Accordingtotheoverallarrangementoftheprojectconstruction,theownerrequestedwithinonemonth(ieMarch18to4,2004).Onthe18thofthemonth,theblastingtaskofeightlimestoneorphanchambersintheplantareawascompleted.   1.2Topographyandgeologyinthedetonationarea   Thefourlimestonemountainsinthealuminumplantsitearetoweringandsteeplonepeaks.Theslopeanglesoftheslopesareallgreaterthan45°.Mostofthesurfaceofthemountainisexposedlimestone,withscatteredlocalvegetationandlithologyfromthicktothickthicklimestone.Thelithologyisrelativelyhard,f=7~lO,therockstratumis165/NE,therocklayerdipis27°,thesurfaceoftherockmassisweaklyweathered,thejointfissuresaredeveloped,andthesolitarypeaksarealldevelopedwithcaves,theirsizesaredifferent,andtheshapeisirregular.Mostofthemdevelopinthemiddleandlowerpartsofthemountain,andthereisnowaterinthehole. Therearetwogroupsoffault-fracturezonesneartheeast-westdirection,withawidthofl~3m.Thefracturedzoneofthefaultfracturezoneextendsfromthetoptothefootofthemountain. Thefaultzoneisakeratinousweaksilicifiedrock.   No.2is430mlong,220mwideand63.1mhigh,withablastingcapacityof380,000m3;No.3isolatedpeakis240mlong,200mwide,72.92mhigh,withablastingcapacityof250,000m3;No.4isolatedpeakis280mlongandwide120m,height52m,blastingquantity90,000m3;No.8solitarypeaklength260m,width110m,height45.2m,blastingquantity110,000m3.4solitarypeaksrequireblastingfloorelevation690m,totalblastingcapacityis83Millionm3.   1.3Thesurroundingenvironmentoftheexplosionarea   Theblastzoneisatypicalkarstlandform,whichisarelativelyflatdepression.Itissurroundedbyundulatingpeakclusters.Fourorphanpeaksarelocatedinthecenterofthevalley.Theyaredistributedinashapeofafigure,amongwhicharethe3rd,4thand2ndpeaks.Thedistanceis60-80m,the8thisolatedpeakisfarapart,andthedistancebetweenthe4thpeakis500m. Therearevillagesaroundthefourisolatedpeaks.Thenearestdistancetothevillageis80m(multipleobjects),andtherestareabove200-250m.Inadditiontotheresidentialareas,therearehigh-voltagelinesandcommunicationstations.(structure)andfacilities,thedistancefromtheexplosionzoneisabout400~500m(asshowninFigure1).    1.4Technicalrequirementsforblastingdesign   GuangxiHuayinAluminumCo.,Ltd.putsforwardthefollowingrequirementsforthedesignofchamberblastingtechnology:   (1)Blastingelevation:allbrokenabove690melevation.   (2)Therockmassafterblastingislessthan300mm,accountingfor60%;300-600mmormore,30%;600mmormore,accountingfor10%.   (3)Projectduration:March18toApril18,atotalof30days.   (4)Noharmtothehousesandotherfacilitiesaroundtheexplosionarea.   2blastingdesign   2.1Blastingplan   Thepurposeofthisblastingistoflatten4orphanpeaks,andtheblastingfragmentshavegradingrequirements.Theenergydistributionofthestrip-shapeddrugroomisuniform,andtheblockandgradingcontrolisbetter.Atthesametime,thelowerpartofthefourisolatedpeaksareconsidered.Thethicklayerandthethicklayeroflimestone,withthemiddlelayeroflimestoneinterposedtherebetween,sotheconcentratedchamberblastingisusedinthethicklayersection,andtheblastingschemecombiningthestripmedicinechamberandtheconcentratedmedicinechamberisgenerallyadopted. Inordertoeffectivelyprotectthebuilding(structure)aroundtheexplosionarea,thedrugroomisarrangedinlayers,theupperdrugroomisdesignedtostrengthenthelooseblasting,thelowerdrugroomislooseblasting,andtheminimumresistancelineiscontrolledwithin20m. Thedetonatingtubeisusedtodetonatethenetwork. Theblastingschemesofthefoursolitarypeaksareasfollows:   (1)No.2orphanpeakiselliptical,withlittlechangeintopography.Themiddleandupperpartsaremedium-thicklayeredlimestone,andthelowerpartisthicktothickthicklayeredlimestone.Twolayersofdrugroomarearranged,andtheupperlayerisstrip-shapedmedicine.Theroomisreinforcedbylooseblasting,andthelowerlayerislooseblastingofconcentrateddrugroom.   (2)TheNo.3orphanpeakisanearlyverticalcylindricalpeak,andthelithologyisamediumthicklayeredlimestone.Threelayersofdrugchambersarearranged.Theuppertwolayersofthedrugchamberarestrip-shapeddrugchambers,whicharecollapsedandblasted.Concentrateddrugroomlooseningblasting.   (3)The4thpeakissimilartothetiger-likeshape.Thefirst(southend)isamedium-thicklayeredlimestone,thelowerpartandthenorthpartarethickandthickthicklayeredlimestone,thesouthissetupwithtwolayersofmedicinerooms,andthenorthissetwithalayerofmedicine.Room,usingconcentrateddrugroomlooseblasting.   (4)No.8orphanpeakissimilartodiamondshape,lithologyismediumthicklayeredlimestone,80monthenorthwestsideofthemountainismulti-objective,mostofthehousesaremudbrickstructure,twolayersofdrugroomarearranged,andthestrip-shapeddrugroomisloosened.blasting.   2.2Designprinciples   Thechamberblastingperiodistight,thesu
Liaoning Science and Technology Museum will be demolished before the end of the month
Liaoning Science and Technology Museum will be demolished before the end of the month
LiaoningScienceandTechnologyMuseumblastinginvestigation   The20thflooroftheLiaoningScienceandTechnologyMuseum(includingthebasement)isaClassAdemolitionblastingprojectwithhigh-strengthreinforcedconcretemixedsoilandshearwallframehybridstructure. Thesteelbarsare1.5timeslargerthanordinarybuildings. TheprojectwasundertakenbyFujianGaonengConstructionEngineeringCo.,Ltd.andwasresponsibleforthedemolitionblastingdesignandconstructiongeneralcontractingwork. Thedesignadopts“gravitybendingdistance,airdisintegration,buffercollapseblastingdemolitiontechnology”(FujianGaonenghassuccessfullyappliedthistechnologytomanyA-classdemolitionblastingprojectssuchasShenyangXiagong,TielingQinghePowerPlantandSanmingIronandSteelPlant).  ChenShaopan,ChairmanofFujianGaonengConstructionEngineeringCo.,Ltd.   Theblastingdemolitionprojectwilluse116kilogramsofexplosives,dividedinto2078drugpacks,usingacombinationofmillisecondsandhalf-secondsofdetonationtechnologytocompletethedetonationwithin2seconds,sothatthebuildingbodyinthegravitybendingdistance,shearforceNext,therupturebodyisinterruptedintheair,collidedwitheachother,andslopingslightlytothenorth.Thedisassembledcomponentsaresuccessivelybufferedandcollapsed;within6seconds,theyarestackedwithin30metersofthenorthsidetopreventthewholebodyfromdumpingonceandhittingtheground.Theresultingvibrationintensity,orsplashesofgroundflyingstones.   Thelow-risebuildingsofthepodiumandtheannexbuildingoftheScienceandTechnologyMuseumhavebeenfirstlydismantledbyartificialmachinery,andsomeofthewasteresidueremainswithin30metersofthenorthsideofthemainbuildingasabufferforthecollapseofthemainbuildingoftheScienceandTechnologyMuseum. Thevibrationintensityofthebuildingimpactingthegroundisfurtherreduced.   Afteradoptingtheaboveblastingtechnology,themechanicalsecondarysolutionandthesmallamountofworkafterblastingdemolitionarealsosignificantlyreduced,andthedemolitiontimeisshortened,whichwillgreatlyspeeduptheurbandemolitionwork.   Theshort-termdustgeneratedaftertheblastingwillbesprayedandcleanedbysprinklersandfiretrucks.   ShiDaoyu,DemolitionEngineeringCommand,LiaoningScienceandTechnologyMuseum   April20,2011   PastandPresent   Oneofthefourmajoranti-drugeducationbasesinthecountry   Whentheanti-drugexhibitionwaslaunched,manypeopleinShenyangwouldthinkoftheLiaoningScienceandTechnologyMuseumnexttotheYouthStreet.   Today,thisimportantbuildingwillbefrozeninaninstant,anditisexpectedtocontinueitsmissioninWeinaninthefuture.   Today,openBaidu.comandenterthe“ShenyangAnti-drugExhibition”.Morethan20piecesofrelevantinformationwillbefound.TheaddressiswrittenatLiaoningScienceandTechnologyMuseum,No.44WenyiRoad,ShenheDistrict.   CitizenChenMingtoldreporters,"Iwillneverforgettheskinnydrug-usingmanattheAnti-DrugExhibition.Letmeknowhowterribledrugsare.Idon'tevensmoke,Iamafraidthatitisrelatedtodruguse."   Earlier,itwasreportedthatafterthedismantlingoftheoldscienceandtechnologymuseum,theLiaoningScienceandTechnologyMuseumwillberelocatedtoatemporaryoffice. Atthesametime,ascienceandtechnologyvenueintegratingscienceeducationandscientificandtechnologicalexchangeswillbebuiltinthesouthernpartofAnhuiProvince. Thelocationofthenewbuildinghasbeencompletedandisscheduledtobedeliveredin2013.   Mr.Chen,whoworkedintheLiaoningScienceandTechnologyMuseum,toldthereporterthattheScienceandTechnologyMuseumwasputintousein1988andheldaconferenceonacademicandscientificexchanges. Since2004,thelong-termanti-drugexhibitionhasbeenheldhere.Everyyear,alargenumberofprimaryandmiddleschoolteachersandstudentsareheretovisit.Itisopentothepublicfreeofchargeeveryyearandisoneofthefourmajoranti-drugeducationbasesinChina.   Originalsiteplanning   Buildingthecountry'sfirstexperientialculturalsquare   Afterthedisappearanceofascienceandtechnologymuseum,itwillbereplacedbythecountry’sfirstexperientialculturalsquare.   Yesterday,therelevantpersoninchargeoftheUrbanConstructionBureauofShenheDistrictrevealedtoreportersthatafterthedemolitionoftheNorthernBookCityandtheScienceandTechnologyMuseum,abrand-newculturalsquarewillrisehere. Relevantinformationshowsthattheexperientialculturesquarestillhighlightsthecombinationofculturalindustryandserviceindustry,withbooksasthemainstay,"clusterotherculturalcontentandindustry"inwhichmultimediaandothermaterialsareusedtodisplayculturalcharacteristicsandincorporatebooks.Large-scaleculturalconsumptionoflarge-scalebuildings,suchaseducation,media,entertainment,performingarts,catering,amusementparks,scienceandtechnologymuseums,andgalleries.   Accordingtotheplan,theexperientialculturesquareisexpectedtobecompletedandputintouseinthefirsthalfof2013. Theoverallplanisinitiallydeterminedtoconsistof8planesonthegroundand1floorontheground.Thetotalscaleisexpectedtobe25,000squaremeters. Atthattime,thepublicmayfeelcultural3Dmovies,multimediareadingplatformsandhigh-techculturalexperienceproductshere,sothatthewayinwhichbookshaveexpressedculturalknowledgehasbeenexpanded.   Duetothelargescopeoftheproposedexperientialculturalsquare,theShenyangIndoorEnvironmentalMonitoringCenterandtheShenyangHousi
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LiaoningScienceandTechnologyMuseumblastinginvestigation   The20thflooroftheLiaoningScienceandTechnologyMuseum(includingthebasement)isaClassAdemolitionblastingprojectwithhigh-strengthreinforcedconcretemixedsoilandshearwallframehybridstructure. Thesteelbarsare1.5timeslargerthanordinarybuildings. TheprojectwasundertakenbyFujianGaonengConstructionEngineeringCo.,Ltd.andwasresponsibleforthedemolitionblastingdesignandconstructiongeneralcontractingwork. Thedesignadopts“gravitybendingdistance,airdisintegration,buffercollapseblastingdemolitiontechnology”(FujianGaonenghassuccessfullyappliedthistechnologytomanyA-classdemolitionblastingprojectssuchasShenyangXiagong,TielingQinghePowerPlantandSanmingIronandSteelPlant).  ChenShaopan,ChairmanofFujianGaonengConstructionEngineeringCo.,Ltd.   Theblastingdemolitionprojectwilluse116kilogramsofexplosives,dividedinto2078drugpacks,usingacombinationofmillisecondsandhalf-secondsofdetonationtechnologytocompletethedetonationwithin2seconds,sothatthebuildingbodyinthegravitybendingdistance,shearforceNext,therupturebodyisinterruptedintheair,collidedwitheachother,andslopingslightlytothenorth.Thedisassembledcomponentsaresuccessivelybufferedandcollapsed;within6seconds,theyarestackedwithin30metersofthenorthsidetopreventthewholebodyfromdumpingonceandhittingtheground.Theresultingvibrationintensity,orsplashesofgroundflyingstones.   Thelow-risebuildingsofthepodiumandtheannexbuildingoftheScienceandTechnologyMuseumhavebeenfirstlydismantledbyartificialmachinery,andsomeofthewasteresidueremainswithin30metersofthenorthsideofthemainbuildingasabufferforthecollapseofthemainbuildingoftheScienceandTechnologyMuseum. Thevibrationintensityofthebuildingimpactingthegroundisfurtherreduced.   Afteradoptingtheaboveblastingtechnology,themechanicalsecondarysolutionandthesmallamountofworkafterblastingdemolitionarealsosignificantlyreduced,andthedemolitiontimeisshortened,whichwillgreatlyspeeduptheurbandemolitionwork.   Theshort-termdustgeneratedaftertheblastingwillbesprayedandcleanedbysprinklersandfiretrucks.   ShiDaoyu,DemolitionEngineeringCommand,LiaoningScienceandTechnologyMuseum   April20,2011   PastandPresent   Oneofthefourmajoranti-drugeducationbasesinthecountry   Whentheanti-drugexhibitionwaslaunched,manypeopleinShenyangwouldthinkoftheLiaoningScienceandTechnologyMuseumnexttotheYouthStreet.   Today,thisimportantbuildingwillbefrozeninaninstant,anditisexpectedtocontinueitsmissioninWeinaninthefuture.   Today,openBaidu.comandenterthe“ShenyangAnti-drugExhibition”.Morethan20piecesofrelevantinformationwillbefound.TheaddressiswrittenatLiaoningScienceandTechnologyMuseum,No.44WenyiRoad,ShenheDistrict.   CitizenChenMingtoldreporters,"Iwillneverforgettheskinnydrug-usingmanattheAnti-DrugExhibition.Letmeknowhowterribledrugsare.Idon'tevensmoke,Iamafraidthatitisrelatedtodruguse."   Earlier,itwasreportedthatafterthedismantlingoftheoldscienceandtechnologymuseum,theLiaoningScienceandTechnologyMuseumwillberelocatedtoatemporaryoffice. Atthesametime,ascienceandtechnologyvenueintegratingscienceeducationandscientificandtechnologicalexchangeswillbebuiltinthesouthernpartofAnhuiProvince. Thelocationofthenewbuildinghasbeencompletedandisscheduledtobedeliveredin2013.   Mr.Chen,whoworkedintheLiaoningScienceandTechnologyMuseum,toldthereporterthattheScienceandTechnologyMuseumwasputintousein1988andheldaconferenceonacademicandscientificexchanges. Since2004,thelong-termanti-drugexhibitionhasbeenheldhere.Everyyear,alargenumberofprimaryandmiddleschoolteachersandstudentsareheretovisit.Itisopentothepublicfreeofchargeeveryyearandisoneofthefourmajoranti-drugeducationbasesinChina.   Originalsiteplanning   Buildingthecountry'sfirstexperientialculturalsquare   Afterthedisappearanceofascienceandtechnologymuseum,itwillbereplacedbythecountry’sfirstexperientialculturalsquare.   Yesterday,therelevantpersoninchargeoftheUrbanConstructionBureauofShenheDistrictrevealedtoreportersthatafterthedemolitionoftheNorthernBookCityandtheScienceandTechnologyMuseum,abrand-newculturalsquarewillrisehere. Relevantinformationshowsthattheexperientialculturesquarestillhighlightsthecombinationofculturalindustryandserviceindustry,withbooksasthemainstay,"clusterotherculturalcontentandindustry"inwhichmultimediaandothermaterialsareusedtodisplayculturalcharacteristicsandincorporatebooks.Large-scaleculturalconsumptionoflarge-scalebuildings,suchaseducation,media,entertainment,performingarts,catering,amusementparks,scienceandtechnologymuseums,andgalleries.   Accordingtotheplan,theexperientialculturesquareisexpectedtobecompletedandputintouseinthefirsthalfof2013. Theoverallplanisinitiallydeterminedtoconsistof8planesonthegroundand1floorontheground.Thetotalscaleisexpectedtobe25,000squaremeters. Atthattime,thepublicmayfeelcultural3Dmovies,multimediareadingplatformsandhigh-techculturalexperienceproductshere,sothatthewayinwhichbookshaveexpressedculturalknowledgehasbeenexpanded.   Duetothelargescopeoftheproposedexperientialculturalsquare,theShenyangIndoorEnvironmentalMonitoringCenterandtheShenyangHousi
Wuhan Jingwu Road blasted 7 residential buildings today
Wuhan Jingwu Road blasted 7 residential buildings today
Pictured:ThebuildingbelowtheblacknetwillbetakenbytheblastingreporterZhuXiyongtoday.   ChutianMetropolisDailyreportedthatWuhanBlastingCompanyannouncedyesterdaythatat3pmtoday,theJingwuRoadareaof​​Hankouwilldemolish7residentialbuildingsinonetime,withaconstructionareaof​​40,000squaremeters,whichisthelargestnumberofone-timedetonatedbuildingsinHubei.Thelargestgroupofbuildingswasdemolishedandblasted.   Yesterdaymorning,thereportervisitedtheblastingsiteofJingwuRoadareainadvance,andaskedLuoQijun,theheadofWuhanBlastingCompany,toexplaintheplananddifficultiesof“ChutianFirstExplosion”.   Blasting7residentialbuildingsisexpectedtotakemorethan10seconds   ThereporterenteredJingwuRoadfromJiefangAvenueyesterday.InthemiddlesectionofJingwuRoad,thereportersawseveralbuildingswithblackprotectivenets,andseveralbuildingssurroundedbybambooraftsandbambooraftwalls.ThetopofthebuildinghangstheredofWuhanblastingcompany.Banner,armedpolicesoldiersstandoutsidethebuildings. "Thebuildingsyouseearethebuildingstobedemolishedtomorrowafternoon.Thereareatotalofsevenbuildings.Nowourengineersandtechniciansareconnectingtheblastingnetworkinthebuilding.Itisexpectedthatthe7buildingswillbelaiddowninmorethan10seconds.LuoQijunintroduced.   The7buildingsaredistributedwithinaradiusof150meters,5buildingsare8floors,andtheother2buildingsare9floors,allbuiltinthe1980sand1990s.   Accordingtostatistics,thisblastingdrilled15,000blastholes,using18,000detonatingtubesand480kgofexplosives. Therehavebeenmanylarge-scaleblastingsinWuhanhistory.Forexample,Yongqingtabletshavebeendemolishedinsixbuildingsbyone-timeblasting,andtoday'sblastingwilldemolish7buildingsinonetime,soitiscalled“ChutianFirstExplosion”.   TherearemanybuildingstobedemolishedintheJingwuarea.Blastingisonlyoneofthedemolitionmethods,mainlyforbuildingsof8floorsandabove,andforbuildingsbelow8floors.   Theblastingmethodsvaryfrom7buildingstodifferentstructures.   LuoQijunsaidthatduetothevarioustypesofstructuresinthesevenbuildings,theenvironmentinwhichtheyarelocatedisnotthesame,andtheblastingmethodsadoptedbytheblastingcompaniesarealsodifferent.   Thedistancebetweenthe1#buildingandthe2#buildingisonly10centimeters,andtheblastingcompanydecidedtoletthemcollapseback. Thereisarowofbungalows21metersawayfromthesouthsideofthe1#building.Itisacarrepairfactoryandisstillinproduction. Inordernottoaffectthecarrepairanddistributionplant,theblastingcompanyadoptedatime-delayblastingtechniquefromtheeasttothewestforthe1#floor,whichcanreducethefrontimpactdistance.   The2#buildingisa“cross-shaped”structurewitha9-storeybuilding,whichisthebiggestdifficultyinthisblasting. Inadditiontotheexplosivedetonatorsinstalledonthe1stto3rdfloors,theblastingcompanyalsoinstalledexplosivedetonatorsonthe6thfloor,andtheblastingareaisonemorelayerthanthegeneralbuilding.   The3#buildingadoptsaverticaltosouth-by-spandelaycollapsetechnique.   The4#buildingandthe5#buildingareonly1.5metersapart. Theblastingcompanydecidedtoletthe4#buildingcollapsetothewestandthe5#buildingcollapsedtothesouth.   The6#buildingandthe7#buildingareall“one-shaped”single-familybuildings,andtheblastingdifficultyisrelativelysmall.Theformerisorientedtocollapsewestward,andthelatterisorientedtocollapsesouthward.   300giantwaterbagsdust-proofprotectivenetanti-splash   Suchalarge-scaleblastingwillinevitablygeneratealargeamountofdust,andhowshouldtheblastingpartyrespond?   LuoQijunintroducedthatoneweekbeforetheblasting,peoplewerearrangedtousethewaterinthefirehydranttoflushthedustanddregsinthebuildingtominimizetheamountofdustgenerated. Inordertopreventdustduringtheblastingprocess,theblastingcompanypurchasedmorethan300giantwaterbagsandplacedthemineachblastingfloor. Eachwaterbagis8meterslongand1meterindiameterandcanhold5cubicmetersofwater. Somefloorshave20waterbags. However,sincethereareonly2firehydrantsattheblastingsite,waterbagscannotbeplacedonsomefloors. "Althoughsomemeasureshavebeentakentoreducedust,itisdifficulttocompletelyeliminatethedustonthesite.Thisisalsotopleasethepublic."LuoQijunsaid.   Inordertopreventspattersfromblasting,peopleareinstalledwithprotectivenetsorbambootrussesandbamboofencewalls. SincetheblastinghasbasicallynoimpactontheroadssuchasJiefangAvenue,XinhuaRoadandJianghanNorthRoad,trafficcontrolwillnotbeimplementedduringtheaboveroadblasting.   Specialpersonescortingblastingequipment,armedpolicesoldiersguardingthebuilding   Theamountofexplosivesanddetonatorsusedinthisblastingisverylarge.Howaretheseblastingequipmentdeliveredtothescene?   LuoQijunsaidthatinordertouseblastingequipment,theblastingcompanymustfirstreporttheblastingplantothepublicsecuritydepartment.Thepublicsecuritydepartmentorganizesexpertstodemonstratetheplan.Iffeasible,theblastingcompanywilldeclarethedosageanddeliverittothesitebyaspecialcivilexplosivecompany.   TheblastingequipmentrequiredforthisblastingwassentfromJiangxiaDistrict. Thecivilexplosioncompanydistributesbyday,thatis,thedailydeliveryamountistheamountrequiredfortheconstructionoftheblastingcompanyonthesameday.Ifitisnotfinished,itmustbereturnedtotheJiangxiawareho
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Pictured:ThebuildingbelowtheblacknetwillbetakenbytheblastingreporterZhuXiyongtoday.   ChutianMetropolisDailyreportedthatWuhanBlastingCompanyannouncedyesterdaythatat3pmtoday,theJingwuRoadareaof​​Hankouwilldemolish7residentialbuildingsinonetime,withaconstructionareaof​​40,000squaremeters,whichisthelargestnumberofone-timedetonatedbuildingsinHubei.Thelargestgroupofbuildingswasdemolishedandblasted.   Yesterdaymorning,thereportervisitedtheblastingsiteofJingwuRoadareainadvance,andaskedLuoQijun,theheadofWuhanBlastingCompany,toexplaintheplananddifficultiesof“ChutianFirstExplosion”.   Blasting7residentialbuildingsisexpectedtotakemorethan10seconds   ThereporterenteredJingwuRoadfromJiefangAvenueyesterday.InthemiddlesectionofJingwuRoad,thereportersawseveralbuildingswithblackprotectivenets,andseveralbuildingssurroundedbybambooraftsandbambooraftwalls.ThetopofthebuildinghangstheredofWuhanblastingcompany.Banner,armedpolicesoldiersstandoutsidethebuildings. "Thebuildingsyouseearethebuildingstobedemolishedtomorrowafternoon.Thereareatotalofsevenbuildings.Nowourengineersandtechniciansareconnectingtheblastingnetworkinthebuilding.Itisexpectedthatthe7buildingswillbelaiddowninmorethan10seconds.LuoQijunintroduced.   The7buildingsaredistributedwithinaradiusof150meters,5buildingsare8floors,andtheother2buildingsare9floors,allbuiltinthe1980sand1990s.   Accordingtostatistics,thisblastingdrilled15,000blastholes,using18,000detonatingtubesand480kgofexplosives. Therehavebeenmanylarge-scaleblastingsinWuhanhistory.Forexample,Yongqingtabletshavebeendemolishedinsixbuildingsbyone-timeblasting,andtoday'sblastingwilldemolish7buildingsinonetime,soitiscalled“ChutianFirstExplosion”.   TherearemanybuildingstobedemolishedintheJingwuarea.Blastingisonlyoneofthedemolitionmethods,mainlyforbuildingsof8floorsandabove,andforbuildingsbelow8floors.   Theblastingmethodsvaryfrom7buildingstodifferentstructures.   LuoQijunsaidthatduetothevarioustypesofstructuresinthesevenbuildings,theenvironmentinwhichtheyarelocatedisnotthesame,andtheblastingmethodsadoptedbytheblastingcompaniesarealsodifferent.   Thedistancebetweenthe1#buildingandthe2#buildingisonly10centimeters,andtheblastingcompanydecidedtoletthemcollapseback. Thereisarowofbungalows21metersawayfromthesouthsideofthe1#building.Itisacarrepairfactoryandisstillinproduction. Inordernottoaffectthecarrepairanddistributionplant,theblastingcompanyadoptedatime-delayblastingtechniquefromtheeasttothewestforthe1#floor,whichcanreducethefrontimpactdistance.   The2#buildingisa“cross-shaped”structurewitha9-storeybuilding,whichisthebiggestdifficultyinthisblasting. Inadditiontotheexplosivedetonatorsinstalledonthe1stto3rdfloors,theblastingcompanyalsoinstalledexplosivedetonatorsonthe6thfloor,andtheblastingareaisonemorelayerthanthegeneralbuilding.   The3#buildingadoptsaverticaltosouth-by-spandelaycollapsetechnique.   The4#buildingandthe5#buildingareonly1.5metersapart. Theblastingcompanydecidedtoletthe4#buildingcollapsetothewestandthe5#buildingcollapsedtothesouth.   The6#buildingandthe7#buildingareall“one-shaped”single-familybuildings,andtheblastingdifficultyisrelativelysmall.Theformerisorientedtocollapsewestward,andthelatterisorientedtocollapsesouthward.   300giantwaterbagsdust-proofprotectivenetanti-splash   Suchalarge-scaleblastingwillinevitablygeneratealargeamountofdust,andhowshouldtheblastingpartyrespond?   LuoQijunintroducedthatoneweekbeforetheblasting,peoplewerearrangedtousethewaterinthefirehydranttoflushthedustanddregsinthebuildingtominimizetheamountofdustgenerated. Inordertopreventdustduringtheblastingprocess,theblastingcompanypurchasedmorethan300giantwaterbagsandplacedthemineachblastingfloor. Eachwaterbagis8meterslongand1meterindiameterandcanhold5cubicmetersofwater. Somefloorshave20waterbags. However,sincethereareonly2firehydrantsattheblastingsite,waterbagscannotbeplacedonsomefloors. "Althoughsomemeasureshavebeentakentoreducedust,itisdifficulttocompletelyeliminatethedustonthesite.Thisisalsotopleasethepublic."LuoQijunsaid.   Inordertopreventspattersfromblasting,peopleareinstalledwithprotectivenetsorbambootrussesandbamboofencewalls. SincetheblastinghasbasicallynoimpactontheroadssuchasJiefangAvenue,XinhuaRoadandJianghanNorthRoad,trafficcontrolwillnotbeimplementedduringtheaboveroadblasting.   Specialpersonescortingblastingequipment,armedpolicesoldiersguardingthebuilding   Theamountofexplosivesanddetonatorsusedinthisblastingisverylarge.Howaretheseblastingequipmentdeliveredtothescene?   LuoQijunsaidthatinordertouseblastingequipment,theblastingcompanymustfirstreporttheblastingplantothepublicsecuritydepartment.Thepublicsecuritydepartmentorganizesexpertstodemonstratetheplan.Iffeasible,theblastingcompanywilldeclarethedosageanddeliverittothesitebyaspecialcivilexplosivecompany.   TheblastingequipmentrequiredforthisblastingwassentfromJiangxiaDistrict. Thecivilexplosioncompanydistributesbyday,thatis,thedailydeliveryamountistheamountrequiredfortheconstructionoftheblastingcompanyonthesameday.Ifitisnotfinished,itmustbereturnedtotheJiangxiawareho
Shenzhen stopped blasting operations on August 10
Shenzhen stopped blasting operations on August 10
Time of issue : 2019-05-08 17:25:00
PhoenixNetworkNewsAstheUniversiadeisapproaching,thesecurityworkoftheUniversiadeisproceedinginanorderlymanner. Yesterday,theMunicipalLegislativeAffairsOfficeissuedanoticeontheofficialwebsite(http//fzj.sz.gov.cn)onstrengtheningthesafetymanagementoffirearms,ammunition,explosives,highlytoxic,radioactiveandotherdangerousgoodsduringtheShenzhenUniversiade.Thedecisionontoolsafetymanagementisopentothepublicforcomments.   Accordingtothe"DecisiononStrengtheningToolSafetyManagement",duringtheperiodfromJuly1,2011toAugust31,2011,thedangeroustoolsalesunitshall,within10daysafterthedecisiontakeseffect,thenumberofdangeroustoolsintheunit,Thestoragelocationandmanagementpersonnelshallbereportedtothepolicestationofthejurisdictionfortherecord. Thetoolsalesunitshallcheckthepurchaser'sidentitydocumentorunitcertificate,registerthepurchaser'sidentityinformation,thenameoftheunit,thevarietyandquantityofthepurchasedtool,andreporttheregistrationtothelocalpolicestationforfiling. Ifadangeroustoolisusedtoenterapublicplaceortakepublictransportation,thecarriershouldtakeprotectivemeasures.   "NoticeonStrengtheningtheSafetyManagementofFirearms,Ammunition,Explosion,HighlyToxic,RadioactiveandOtherDangerousGoodsduringtheShenzhenUniversiade",fromAugust10toAugust25,2011,inprinciple,stoptransportingpoisonousdrugstoShenzhenorthroughShenzhen.Chemicals. Duringtheabove-mentionedperiod,theMunicipalPublicSecurityBureaustoppedtheexaminationandapprovalofthepurchaseandtransportationofexplosivesandhighlytoxicchemicals,andstoppedallblastingoperations.TheMunicipalHabitatEnvironmentCommitteestoppedtheexaminationandapprovalofthetransferofradioactivematerials.
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PhoenixNetworkNewsAstheUniversiadeisapproaching,thesecurityworkoftheUniversiadeisproceedinginanorderlymanner. Yesterday,theMunicipalLegislativeAffairsOfficeissuedanoticeontheofficialwebsite(http//fzj.sz.gov.cn)onstrengtheningthesafetymanagementoffirearms,ammunition,explosives,highlytoxic,radioactiveandotherdangerousgoodsduringtheShenzhenUniversiade.Thedecisionontoolsafetymanagementisopentothepublicforcomments.   Accordingtothe"DecisiononStrengtheningToolSafetyManagement",duringtheperiodfromJuly1,2011toAugust31,2011,thedangeroustoolsalesunitshall,within10daysafterthedecisiontakeseffect,thenumberofdangeroustoolsintheunit,Thestoragelocationandmanagementpersonnelshallbereportedtothepolicestationofthejurisdictionfortherecord. Thetoolsalesunitshallcheckthepurchaser'sidentitydocumentorunitcertificate,registerthepurchaser'sidentityinformation,thenameoftheunit,thevarietyandquantityofthepurchasedtool,andreporttheregistrationtothelocalpolicestationforfiling. Ifadangeroustoolisusedtoenterapublicplaceortakepublictransportation,thecarriershouldtakeprotectivemeasures.   "NoticeonStrengtheningtheSafetyManagementofFirearms,Ammunition,Explosion,HighlyToxic,RadioactiveandOtherDangerousGoodsduringtheShenzhenUniversiade",fromAugust10toAugust25,2011,inprinciple,stoptransportingpoisonousdrugstoShenzhenorthroughShenzhen.Chemicals. Duringtheabove-mentionedperiod,theMunicipalPublicSecurityBureaustoppedtheexaminationandapprovalofthepurchaseandtransportationofexplosivesandhighlytoxicchemicals,andstoppedallblastingoperations.TheMunicipalHabitatEnvironmentCommitteestoppedtheexaminationandapprovalofthetransferofradioactivematerials.
Demolition and blasting of buildings (structures)
Demolition and blasting of buildings (structures)
Time of issue : 2019-05-08 17:21:00
01columnaryprismialobject Itreferstoacomponentthatisalwayslargerinsizethantheothertwodimensions. Suchasbeams,columns,etc. 02blockblockobject Astructureinwhichthethree-waysizeisgenerallylargeiscalledablock. Suchasfoundation,pierandsoon. 03thinwallstructure Structuresthatarealwaysmuchsmallerinsizethantheothertwo-waydimensions,suchaswalls,floors,andthelike. 04alldemolitionblastcleandemolishingblast Alldemolitionblastingrequiresthatalltheexplodedbodiesbebroken. Ifthemachineisshipped,theblocksizemaybeappropriatelylarger;ifmanualslagisused,thebrokenblocksizeshouldnotbetoolarge.  05cuttingandblastingjoint-cuttingblast 1)Cuttingandblastingaredividedintotwosituations,oneistodisassemblethecomponent,theotheristoremoveapartofthecomponent,retainapart,andtheretainedpartisnotdestroyed,andmustusepre-crackingorsmoothblasting. 2)Inengineering,theplane-symmetriclong-shapedshapedenergypackismainlyusedforcuttingmetalsheetsandpipes,anditisapromisingprocessforcuttinghullsteelsheets. 06Principleofcuttingandblastingprincipleofjoint-cuttingblast Thecuttingblastingmethodusestheblastingmethodtoformacrackinthedirectionoftheconnectionoftheblasthole,soastoachievethepurposeofremovingapartoftheretainingpart. Accordingtotherockblastingmechanism,whentheexplosiveisexplodedinsidetherock,itisdividedintothecrushingzone,thefracturezoneandthevibrationzoneaccordingtothedegreeofrockdamage. Theprincipleofcuttingandblastingistoeliminatethecrushingzoneandcontrolthecrackzone. 07presplitblasting Pre-crackingblastingistoarrangearowofpre-crackingholesalongthecuttingjoint.Afterthefirstdetonation,apre-crackisformedalongthepre-crackinghole,andthenthenon-retainedpartisblastedanddismantled. Duetothepre-crack,theretainedpartneedstobeprotected. 08smoothwallblasting Thedifferencebetweensmoothcutblastingandpre-splittingblastingisthatthelightfaceisfinallydetonated.Itisnotonlyresponsiblefortheformationofcracks,butalsoforthecrushingofconcreteinfrontofthelightface. 09thin-wallstructuredemolitionblastingofthinwallstructure Duetothethinplatestructure,itcanonlybedrilledalongthesmallestdimension.Itscharacteristicsareasfollows:1)Theminimumresistancelineisconsistentorobliquetothedirectionoftheblasthole,andnolateralfreesurfacecanbeused;2)Theblastholeisshallowandtheminimumresistancelineissmall.Therefore,itisveryeasytoproduceflyingstones;3)theblastholeisshallow,theholespacingandtherowspacingaresmall,thusincreasingthedrillingandchargingworkload,andtheblastingcostisincreased. 10floorblastinghardgroundblasting Floorreferstoapavementorsiteconstructedofartificialmaterials. Demolitionofconcretepavedroadsorsitesbyblastingiscalledfloorblasting. 11wideholeblastingofwidegroundblastingofhardground Becausetheconventionalfloorblastingisdifficult,intheengineeringpractice,awide-pitchblastingtechniquedifferentfromconventionalblastingissummarized. Thekeyofwide-pitchfloorblastingisthatthedepthoftheblastholeisequaltothethicknessδofthefloor.Generally,theholespacingoftheblastholeis2to4timesthatofconventionalblasting,andtheconsumptionofunitexplosiveis1.5to2timesthatofconventionalblasting. Demolitionblastingofstandhighbuildings High-risestructuresgenerallyrefertostructureswithlargeratiosofheightanddiameter,suchaschimneysandwatertowers.Theyarecharacterizedbyhighcenterofgravityandsmallsupportarea,sotheyareveryeasytodestabilizeandcollapseorcollapseundergravitytodisintegrate,sothedestructionofthestructureisAsaresultofgravity,blastingisonlyameansofdestabilizingthestructure. 13structureofwatertowers Thewatertowerisdividedintotwotypes:trusstypesupportandcylindricalsupportaccordingtoitssupporttype. Thetrusstypesupportisareinforcedconcretestructure,andtheremovalmethodissimilartothereinforcedconcreteframestructure;thecylindricalsupportisgenerallyabrickstructure,andtheremovalmethodissimilartothechimneyremoval. Thetoptankisgenerallyareinforcedconcretestructure. 14chimneystructurechimneystructure Theshapeofindustrialandcivilchimneysismostlycylindrical,andafewaresquare. Accordingtothematerialsused,itisdividedintotwotypes:reinforcedconcretestructureandbrickstructurechimney. 15chimneyremovalmethodsdemolishingmethodsofchimneys Therearemanytypesofdemolitionmethodscommonlyusedathomeandabroad,whichcanbebroadlysummarizedintothefollowingthreecategories: 1)mechanicalremovalmethod;2)manualremovalmethod;3)blastingremovalmethod. 16directionalblastingdemolitionofslimandhighbuildings Themainprincipleofthedirectionalcollapsedesignistoblastablastinggaplargerthan1/2ofthebottomcircumferenceatthebottomofthedumpingside,therebydestroyingthestabilityofthestructure,resultingintheinstabilityoftheoverallstructureandtheshiftofthecenterofgravity.Theoverturningmomentisformedbytheweight. Forceittocollapseinapredetermineddirectionwithinacertainrange. 17toweringbuildingscollapsedcollapsedblastingdemolitionofslimandhighbuildings Thetallbuildingsarefoldedfirstandthencollapsedtotouchtheground. Foldingcollapsecanbedividedintotwoways:one-wayfoldingcollapseandtwo-wayfoldingcollapse. Itispreferredaccordingtothesizeofthesurroundingarea. 18high-risebuil
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01columnaryprismialobject Itreferstoacomponentthatisalwayslargerinsizethantheothertwodimensions. Suchasbeams,columns,etc. 02blockblockobject Astructureinwhichthethree-waysizeisgenerallylargeiscalledablock. Suchasfoundation,pierandsoon. 03thinwallstructure Structuresthatarealwaysmuchsmallerinsizethantheothertwo-waydimensions,suchaswalls,floors,andthelike. 04alldemolitionblastcleandemolishingblast Alldemolitionblastingrequiresthatalltheexplodedbodiesbebroken. Ifthemachineisshipped,theblocksizemaybeappropriatelylarger;ifmanualslagisused,thebrokenblocksizeshouldnotbetoolarge.  05cuttingandblastingjoint-cuttingblast 1)Cuttingandblastingaredividedintotwosituations,oneistodisassemblethecomponent,theotheristoremoveapartofthecomponent,retainapart,andtheretainedpartisnotdestroyed,andmustusepre-crackingorsmoothblasting. 2)Inengineering,theplane-symmetriclong-shapedshapedenergypackismainlyusedforcuttingmetalsheetsandpipes,anditisapromisingprocessforcuttinghullsteelsheets. 06Principleofcuttingandblastingprincipleofjoint-cuttingblast Thecuttingblastingmethodusestheblastingmethodtoformacrackinthedirectionoftheconnectionoftheblasthole,soastoachievethepurposeofremovingapartoftheretainingpart. Accordingtotherockblastingmechanism,whentheexplosiveisexplodedinsidetherock,itisdividedintothecrushingzone,thefracturezoneandthevibrationzoneaccordingtothedegreeofrockdamage. Theprincipleofcuttingandblastingistoeliminatethecrushingzoneandcontrolthecrackzone. 07presplitblasting Pre-crackingblastingistoarrangearowofpre-crackingholesalongthecuttingjoint.Afterthefirstdetonation,apre-crackisformedalongthepre-crackinghole,andthenthenon-retainedpartisblastedanddismantled. Duetothepre-crack,theretainedpartneedstobeprotected. 08smoothwallblasting Thedifferencebetweensmoothcutblastingandpre-splittingblastingisthatthelightfaceisfinallydetonated.Itisnotonlyresponsiblefortheformationofcracks,butalsoforthecrushingofconcreteinfrontofthelightface. 09thin-wallstructuredemolitionblastingofthinwallstructure Duetothethinplatestructure,itcanonlybedrilledalongthesmallestdimension.Itscharacteristicsareasfollows:1)Theminimumresistancelineisconsistentorobliquetothedirectionoftheblasthole,andnolateralfreesurfacecanbeused;2)Theblastholeisshallowandtheminimumresistancelineissmall.Therefore,itisveryeasytoproduceflyingstones;3)theblastholeisshallow,theholespacingandtherowspacingaresmall,thusincreasingthedrillingandchargingworkload,andtheblastingcostisincreased. 10floorblastinghardgroundblasting Floorreferstoapavementorsiteconstructedofartificialmaterials. Demolitionofconcretepavedroadsorsitesbyblastingiscalledfloorblasting. 11wideholeblastingofwidegroundblastingofhardground Becausetheconventionalfloorblastingisdifficult,intheengineeringpractice,awide-pitchblastingtechniquedifferentfromconventionalblastingissummarized. Thekeyofwide-pitchfloorblastingisthatthedepthoftheblastholeisequaltothethicknessδofthefloor.Generally,theholespacingoftheblastholeis2to4timesthatofconventionalblasting,andtheconsumptionofunitexplosiveis1.5to2timesthatofconventionalblasting. Demolitionblastingofstandhighbuildings High-risestructuresgenerallyrefertostructureswithlargeratiosofheightanddiameter,suchaschimneysandwatertowers.Theyarecharacterizedbyhighcenterofgravityandsmallsupportarea,sotheyareveryeasytodestabilizeandcollapseorcollapseundergravitytodisintegrate,sothedestructionofthestructureisAsaresultofgravity,blastingisonlyameansofdestabilizingthestructure. 13structureofwatertowers Thewatertowerisdividedintotwotypes:trusstypesupportandcylindricalsupportaccordingtoitssupporttype. Thetrusstypesupportisareinforcedconcretestructure,andtheremovalmethodissimilartothereinforcedconcreteframestructure;thecylindricalsupportisgenerallyabrickstructure,andtheremovalmethodissimilartothechimneyremoval. Thetoptankisgenerallyareinforcedconcretestructure. 14chimneystructurechimneystructure Theshapeofindustrialandcivilchimneysismostlycylindrical,andafewaresquare. Accordingtothematerialsused,itisdividedintotwotypes:reinforcedconcretestructureandbrickstructurechimney. 15chimneyremovalmethodsdemolishingmethodsofchimneys Therearemanytypesofdemolitionmethodscommonlyusedathomeandabroad,whichcanbebroadlysummarizedintothefollowingthreecategories: 1)mechanicalremovalmethod;2)manualremovalmethod;3)blastingremovalmethod. 16directionalblastingdemolitionofslimandhighbuildings Themainprincipleofthedirectionalcollapsedesignistoblastablastinggaplargerthan1/2ofthebottomcircumferenceatthebottomofthedumpingside,therebydestroyingthestabilityofthestructure,resultingintheinstabilityoftheoverallstructureandtheshiftofthecenterofgravity.Theoverturningmomentisformedbytheweight. Forceittocollapseinapredetermineddirectionwithinacertainrange. 17toweringbuildingscollapsedcollapsedblastingdemolitionofslimandhighbuildings Thetallbuildingsarefoldedfirstandthencollapsedtotouchtheground. Foldingcollapsecanbedividedintotwoways:one-wayfoldingcollapseandtwo-wayfoldingcollapse. Itispreferredaccordingtothesizeofthesurroundingarea. 18high-risebuil
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Comprehensive News

Blasting announcement

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The fourth blasting vibration measurement technology seminar was held
BlastingVibrationTestingTechnologySeminar  BlastingVibrationTestingTechnologySeminar   OnApril15-17,2011,ChinaEngineeringBlastingAssociationhelda“BlastingVibrationTechnologySeminar”atButterflyValleyHotelinNanhai,GuangdongProvince.TheconferencewashostedbyChinaEngineeringBlastingAssociation,GuangzhouZhongboSafetyNetTechnologyCo.,Ltd.,YangtzeRiverWaterConservancyThecommitteewasco-organizedbytheYangtzeRiverScientificResearchInstituteandSouthChinaUniversityofTechnology,andGaoYintong,secretarygeneraloftheassociation,presidedoverthemeeting.  ChairmanWangXuguangattendedthemeetingtomakeanimportantspeech   ChairmanWangXuguangattendedthemeetingandmadeanimportantspeech. AcademicianWangpointedout:Atthebeginningofthe12thFive-YearPlan,thesituationinallwalksoflifeisverygood.Thisisagoodpromotionforthedevelopmentofourengineeringblastingindustry,anditalsomakesusfeelacertainpressure. Blastingvibrationmonitoringisamajoreventinourengineeringblastingindustry.ThesafetyaccidentsthattheChinaEngineeringBlastingAssociationhasbeeninvolvedininrecentyearsareallrelatedtotheimpactofblastingvibration.Therefore,theblastingvibrationpropagationlawshouldbewellrecorded,andadatabaseshouldbeestablished.Class,summary,refiningandprocessingcaneffectivelypromotetheresearchofblastingtheoryandpromotethebetterdevelopmentofengineeringblastingindustry.   AcademicianWangreviewedandsummarizedtheresearchworkonvibrationmeasurementintheindustrysincetheChinaEngineeringBlastingAssociation's"StudyontheImpactofBlastingVibrationandTestingTechnology"heldinHangzhouonApril10,2009.WangAcademicianpointedoutthattheChinaAssociationofExplosivesfrom2009SinceAprilofthisyear,threesymposiumsonblastingvibrationtestinghavebeenheld.Thismeetingisthefourthspecialmeeting.Afterthemeeting,thedevelopmentdirectionofindustrialblastingtestingtechnologyandvibrationtestinginstrumentsshouldbeclarifiedandshouldbeimplemented.Apersonisresponsibleforimplementation.   WuXinxia,​​QuGuangjian,GaoYing,HuangYuewen,LongYuan,YangNianhua,GaoWenxue,ChenQiliangandotherexpertsmadespecialspeeches,GuangzhouZhongboSafetyNetTechnologyCo.,Ltd.,SouthChinaUniversityofTechnologyandYangtzeRiverWaterResourcesCommissionChangjiangAcademyofSciencesandotherunitsontheblastingVibrationremotetesting,calibrationandsystemmanagementweredemonstratedanddemonstratedonsite.  ProfessorWuXinxiafromtheYangtzeRiverScientificResearchInstituteoftheYangtzeRiverWaterResourcesCommission  ProfessorQuGuangjianfromGuangzhouZhongboSafetyNetTechnologyCo.,Ltd.  AssociateProfessorGaoYingfromSouthChinaUniversityofTechnology  SeniorEngineerHuangYangwenfromtheYangtzeRiverScientificResearchInstituteoftheYangtzeRiverWaterResourcesCommittee  ProfessorLongYuanfromthePLAUniversityofScienceandTechnology  ResearcherYangNianhuafromChinaAcademyofRailwaySciences  ProfessorofHighLiterature,BeijingUniversityofTechnology  AssociateProfessorChenQiliangfromGuangzhouZhongboSafetyNetTechnologyCo.,Ltd.   ProfessorWuXinxiafromtheYangtzeRiverScientificResearchInstituteoftheYangtzeRiverWaterResourcesCommitteeintroducedtheconstructionconceptandmanagementmodeofthe"DangerDetectionRemoteSensingInformationManagementSystemforEngineeringBlasting"basedontheInternetofThingstechnology,andthecorrespondingblastingremoteintelligentrecorderandblastingvibrationremotecalibrationequipment;GuangzhouZhongboProfessorQuGuangjianofSafetyNetTechnologyCo.,Ltd.introducedtheimportanceofbuildingavibrationmeasurementinformationmanagementsystemandthecomposition,functionandobjectivesofthevibrationmeasurementinformationmanagementsystem,aswellasremotecalibrationtechnology,dataprocessingandmethods;AssociateProfessorGaoYingofSouthChinaUniversityofTechnologyThekeytechnologyofremotecalibrationandvibrationmeasurementplatformbasedonvibrationgridisalsodemonstrated.TheseniorengineerofYangtzeRiverWaterResourcesCommitteeYangYuewenintroducedthecomposition,performanceandremotecalibrationmethodofblastingdatamonitoringsystembasedonInternetofThings.TheproblemwasdiscussedbyProf.LongYuanfromPLAUniversityofScienceandTechnology.Theresearchonthestandardizationofengineeringblastingvibrationtestingtechnologywasintroduced.ResearcherYangNianhuaofChinaRailwayScienceResearchInstituteintroducedthetechnologyoffieldtestingofblastingvibration;ProfessorGaoWenofBeijingUniversityofTechnologyintroducedshallowtunnel Excavationblastingvibrationremotemonitoringsystemandtestingtechnology;AssociateProfessorChenQiliangofGuangzhouZhongboSafetyNetTechnologyCo.,Ltd.takesthewesternpipelineblastingvibrationmonitoringpracticeasanexampletointroducethestepsandcontentsofblastingvibrationmonitoringwork,anddiscussestheblastingvibrationmonitoringtechnologyinthenearApplicationproblemsinpipelineblastingengineering.   Afteraheateddiscussion,theparticipatingexpertsaffirmedthattheapplicationofinformationnetworktechnologyinthefieldofengineeringblastingisthefuturedevelopmenttrend,andputforwardthepreparationofthe"TechnicalTeachingMaterialsforEngineeringBlastingVibrationMeasurementTechnology"and"TechnicalSpecificationsforEngineeringBlastingVibrationInspection(S
Associate Professor Chen Qiliang from Guangzhou Zhongbo Safety Net Technology Co., Ltd.   Professor Wu Xinxia from the Yangtze River Scientific Research Institute of the Yangtze River Water Resources Committee introduced
Announcement:TheMinistryofPublicSecurityissuedtwostandardsforgradingmanagementofblastingoperations   AccordingtotheRegulationsontheSafetyManagementofCivilExplosives,theMinistryofPublicSecurityissuedtwostandardsforthegradingmanagementofblastingoperationsonMay2,2012-"QualificationRequirementsandManagementRequirementsforBlastingOperationUnits"(GA990-2012),Theblastingoperationprojectmanagementrequirements(GA991-2012)(hereinafterreferredtoas"twostandards"),andissuedthe"Noticeontheimplementationoftheblastingoperationunitqualificationconditionsandmanagementrequirements"and"blastingoperationprojectmanagementrequirements"》.   Recently,theMinistryofPublicSecuritywillorganizeandcarryoutnationalpublicityactivities. TheProvincialDepartmentwill,inaccordancewiththespiritoftheMinistryofPublicSecurity'snoticeandtherequirementsofpublicity,combinedwiththepracticeofpublicsecuritymanagementintheblastingoperationindustryofourprovince,carefullystudyandformulatetheimplementationofworksteps,conductresearch,developaworksystem,establishaspecialorganization,andcarryoutimplementationworkinanorderlymanner. Thespecificworkrequirementsaretobenotifiedbytheprovincialgovernment.   AccordingtothenoticeoftheMinistryofPublicSecurity,theworkofcleaningupandrectifyingtheexistingblastingoperationsunitsandissuingthe"BlastingOperationUnitPermit"shallbecompletedbyDecember31,2012. Therefore,asofJanuary1,2013,anyunitmustholdtheBlastingOperationUnitPermittoengageinblastingoperations,otherwiselegalliabilityshouldbepursued. Beforethatdate,theoriginallegal"ExplosivesUsePermit"cancontinuetobeusedbyunitsthathavenotbeenorderedtostoptheiremployment.Thecommercialblastingoperationunitcanstillholdaneffectiveconstructiondepartment"blastinganddemolition"qualification.Thedocumentsareintheprovincetoundertaketheblastingoperationitemsofthecorrespondingtype.   Fromnowon,theprovincewillnolongerapprovetheoriginal"ExplosiveGoodsUsePermit",andthepublicsecurityorganswillstopacceptingtheconditionalreviewworkoftheconstructionandconstructiondepartmententrustedbytheconstructiondepartmentto"blastinganddemolitioncontractingqualifications".   downloadattachment:   1.Noticeontheimplementationofthe"QualificationConditionsandManagementRequirementsforBlastingOperationUnits"and"ManagementRequirementsforBlastingOperationProjects"   2.Qualificationconditionsandmanagementrequirementsoftheblastingoperationunit   3.Blastingoperationprojectmanagementrequirements
Special Report on Demolition Blasting of 104 Meters High Building in Zhongshan City, Guangdong Province
Editor'snote:   ThePeakGardenwasbuiltin1994andwascappedin1997.The34-storeybuildingis344.1metershigh.Itisaframe-supportedshearwallstructure.Itisthetallestbuildingdemolishedbydomesticblastingandhasappliedtobecomethe"Asia'sfirstexplosion".Oneofthefewhigh-risebuildings. ThePeakGardenwasappliedforblastinginFebruarytoofficialblastingonAugust13.Thetimewasupto6months.Thedayswearelookingforwardtoarefinallycoming,andIwishtheChinesepeopleasuccessfulblast!   Joyaftersuccessfulblasting    Figure1   FigureII   Successfulblastingofthetopgarden    PreparetoblastChenShaopantoprovidepictures    ChenShaopanprovidespicturesoftheblastingprocess    ChenShaopanprovidespicturesoftheblastingprocess   ChenShaopanprovidespicturesoftheblastingprocess    ChenShaopanprovidespicturesoftheblastingprocess  ChenShaopanprovidespicturesoftheblastingprocess   ChenShaopanprovidespicturesoftheblastingprocess    ChenShaopanprovidespicturesoftheblastingprocess    ChenShaopanprovidespicturesoftheblastingprocess    ChenShaopanprovidespicturesoftheblastingprocess    ChenShaopanprovidespicturesoftheblastingprocess    ChenShaopanprovidespicturesoftheblastingprocess    ChenShaopanprovidespicturesoftheblastingprocess    ChenShaopanprovidespicturesoftheblastingprocess    ChenShaopanprovidespicturesoftheblastingprocess    ChenShaopanprovidespicturesoftheblastingprocess    ChenShaopanprovidespicturesoftheblastingprocess    ChenShaopanprovidespicturesoftheblastingprocess   ChenShaopanprovidespicturesoftheblastingprocess   "Asia'sfirst-explosion"trackingreport-   Unfinished15yearsofplanning   "Asia'sfirstexplosion"     ——Theblastingofthe104.1mhighbuildingofShijiePeakGardeninZhongshan,Guangdong   "Five,four,three,two,one,detonation!"   At10:30onthemorningofAugust13,withtheorderofLiuWen,thechairmanofthesmashingengineeringheadquartersofShijiePeakGarden,thestaffofGuangdongZhongrenGroupConstructionCo.,Ltd.Pressedthepulsedetonatorinyourhand. "嘣,嘣,嘣..."18consecutiveloudnoises,afterashort3.6seconds,atotalheightof104.1meters,atotalof34layersofZhongshanShijiePeakGardenunfinishedbuildingsweighingtensofthousandsoftonsofbody,oneSuddenly,hesuddenly"squats"andsuddenlyrushestowardthewestsideoftheopenspace. Thethreehigh-poweredfireenginesthathavebeenwaitingforalongtimeimmediatelysprayedahugeamountofwatermist,andcarriedout“interceptioninterception”onthedust“whitesmoke”causedbytheexplosion,andsprinkledwatertoreducedust. Congratulationsontheheadquartersofthemeetingroomonthe4thfloorofShunjingGarden,andthesimpleviewingplatformsetuponthebalconyburstintoapplause. Atthispoint,theblastingprojectofthePeakGarden,whichisknownasthe"Asia'sNo.1Blast",wasacompletesuccess. Afterthat,itwillenterthedemolitionandclean-upphaseforupto50days.   ItisunderstoodthatthetopofthehillgardenislocatedinthesouthsideofZhongshanCollege,DongchengDistrict,ZhongshanCity,ZhongshanCity,ontheeastsideofthesnowroad,willbebuiltintheStarCityBuilding. Thebuildingtobeexplodedis104.1meters,withatotalof34floors(including1basement),33.8meterswidefromeasttowest,38.5meterslongfromnorthtosouth,and27875squaremeters. Thebuildingisframe-supportedshearwallstructure,arrangedina“well”shape.The1stfloorandthebasementareframestructures,the2-32floorsareshearwallstructures,andthemiddlepartisthecoretube. Theeastsideofthebuildingis44metersawayfromthebottomoftheslope,thesoutheastsideis40metersawayfromDongyueTemple;thesouthsideis5.2metersawayfromthewall,only6metersawayfromthenearestresidentialhouse;thewestsideis81metersawayfromthebottomoftheslope. Thebuildingwasbuiltin1994andwascappedin1997. Forvariousreasons,thebuildinghasnotbeenofficiallyputintouse.IthasbeenrenamedasthePeakGarden,YangmingMountainVilla,StarCity,andZhongshanCity,butithasneverbeenabletogetridofthefateofthe"unfinished". InJune2007,thebuildingwastransferredtoZhongshanChangjiangZhaoyeRealEstateDevelopmentCo.,Ltd.asawhole. InordertocopewiththeoverallplanningdevelopmentofZhongshanCity,acceleratethepaceofrenovationoftheoldcity,andaccordingtothecompany'sprojectplanningneeds,decidedtouseblastingdemolition,theplotwillberebuiltafterthedemolition.   OnFebruary25,commissionedbythePublicSecurityBureauoftheMinistryofPublicSecurity,theGuangdongProvincialPublicSecurityDepartmentandtheZhongshanPublicSecurityBureau,theChinaEngineeringBlastingAssociationhostedareviewmeetinginBeijingonthe“BlastingDemolitionProjectoftheUnfinishedBuildingoftheShijiazhuangPeakGardeninZhongshanCity”.TheexpertgroupledbyWangXuguang,academicianoftheChineseAcademyofEngineeringandchairmanoftheChinaEngineeringBlastingAssociation,listenedtothebriefingandreviewrequirementsoftheProvincialPublicSecurityDepartmentandtheMunicipalPublicSecurityBureauontheblastingproject,andintroducedtheconstructionplanoftheGuangdongZhongrenGroup.Afterquestioninganddiscussion,thereviewopinionswereputforwardandtheMunicipalPublicSecurityBureauwasapprovedtoapprovetheconstructionoftheproject. Inordertoensurethesafetyandsuccessoftheblastingdemolitionproject,theZhongshanMunicipalGovernmenthasspeciallysetupacoordinationheadquarters,whichisresponsiblefort
Call for papers on participation in the "6th International Conference on Explosives and Blasting Technology of China, Japan and Korea"
Allrelevantunits:   The6thInternationalConferenceonExplosivesandBlastingTechnologyofChina,JapanandKoreawasscheduledtobeheldinSouthKoreafromOctober12to16,2011.Theconferenceincludedexplosives,detonationequipment,geotechnicalblasting,mineblastinganddemolitionblasting. Inordertostrengtheninternationalacademicexchangesandtechnicalcooperation,theChinaEngineeringBlastingAssociationisnowissuingnoticesofessaystorelevantunitsanddepartments.Expertsfromenterprises,institutions,researchinstitutesanduniversitiesarewelcometosignupandactivelycontributetotheconference.   Theessaycontentisasfollows:   1.Callforpapers:   TheauthorisaskedtofirstsubmitanEnglishabstractofabout200to400words(includingthetitleofthearticle,author,unit,contactnumberande-mail)andkeywords. Thebestchoiceis3to5keywords.   Second,thedraftschedule:   (1)DeadlineforsubmissionofEnglishabstracts:July20,2011   (2)DeadlineforsubmissionoffulltextinEnglish:September10,2011   Third,themodeofsubmission:   PleasesendtheEnglishabstracttotheemailaddress:cseb@cseb.org.cnormingxiuzhu@yahoo.com.cn   Contact:ZhuMingxiu   Contactnumber:(010)88399565   Fax:(010)68344564   Contactaddress:No.1WenxingStreet,Xizhimen,Beijing100044
Seven years of honing the "Blasting Net" sharp display
Time of issue : 2019-05-30 10:01:00
TheCoalIndustryPublishingHousepublishedthenewbook"ThePracticalManualforCoalMineBlasting"publishedinApril2008,andintroducedthedetailsof"ZhongboNet"intheentiresectionofChapter23ofChapter23,fullyaffirmingitssafetytothecoalmineblastingindustry.Informationproductionplaysanimportantrole.   ItisenoughtoprovethatundertheleadershipoftheChinaEngineeringBlastingAssociationandthestrongsupportoftheblastingassociationsofvariousprovincesandcities,aftersevenyearsoftempering,intheeraofrapiddevelopmentofinformationtechnology,"ChinaBlastNetwork"hasbecomeChinawithoutanydispute.Theforerunnerofthedevelopmentofinformationizationintheengineeringblastingindustryhasbecomethelinkoftheinformationtransmissionoftheblastingindustryandthecivilexplosiveequipmentindustryandtheinformationcenterfortheacquisitionofrelevantinformation.   "ChinaBlastNetwork"hasbeenrecognizedbytheindustryasthefirstportalsiteoftheblastingindustry. Theloudandmeaningfulnameof"BlastingNet"isonceagainrevealed!   ChinaBlastingNetworkEditorialDepartment   April10,2009

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