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Demolition of a 120m High Reinforced Concrete Chimney

Demolition of a 120m High Reinforced Concrete Chimney

(Summary description)Completiontime:October2002 ProjectLocation:EmeishanCity,SichuanProvince Completedunit:InstituteofEngineeringBlasting,SouthwestJiaotongUniversity,SichuanYutaiSpecialEngineeringTechnologyCo.,Ltd. Projecthostandparticipants:ShiFuqiang,DuShaohua Writer:ShiFuqiang   1ProjectOverview   EmeiAluminumGroupElectro-metallurgicalplantchangedthesmeltingprocessinordertostrengthenenvironmentalprotection.The120mreinforcedconcretechimneythathasbeenusedfor10yearsneedstobedismantledassoonaspossible. Thechimneyislocatedinthemiddleofthetwoelectricsmeltingplants.Thetotallengthofthefactoryisabout230m,andthecenterlineofthechimneyis13mawayfrombothsides. Thefactorywallis136maheadofthecollapsedirection,andtherearis9.8mawayfromtheaxisofthechimney.Itisthedistributionworkshopofthesmelter(seeFigure1). Therootofthechimneyhasadiameterof8.62mandatopdiameterof3.82m. Belowthe10melevation,thewallthicknessis50cm,whichisadoubleribarrangement,theexternalribisф20,andtheinnerribisф16. Thelininginsulationbrickhasathicknessof24cmanda5cminsulationlayerinthemiddle. Thetotalweightoftheentirechimneyconcreteisabout591.8m3,theself-weightis1830t(includingthelining),andthecenterofgravityis39.8m. Theelectro-metallurgicalplantcannotstopproductionwhentheprojectrequiresblasting. Demolitionofa120mHighReinforcedConcreteChimney   2Blastingdesignandproblemresearch   2.1Chimneycollapsemodeandblastinggapdesign   Accordingtothesurroundingenvironmentofthechimney,byreferringtotheoriginaldataofthechimneyandthefieldtestresults,thesafetyandreliabilityofthechimneyblastingarefullyconsidered,andthedirectionalcollapseofthechimneyblastingisdetermined. Theblastingnotchisarrangedatadistanceofmorethan50cmfromtheground,andthedesignofthedumpingcenterlineisthesymmetrylineofNo.1andNo.2smelters. Thetrapezoidalnotchisselected,thenotchcorrespondstoacentralangleof220°,andtheoutercircumferenceofthechimneyisL=27.08m,sothenotchlengthL′=16.55m,thenotchheightis2.5m,andtheanglea=40°.   2.2grayoutproblem   Thereisagrayoutletontherightsideofthechimneycollapsedirection,80%coincideswiththeorientationwindow,and20%islocatedintheremainingsectoroutsidethegap. Therefore,itmayaffectthedirectionofthedump. Throughcalculationandanalysis,theashoutletenteringtheremainingsectorisinthecompressionzoneatthemomentofblasting.Whenthechimneyisdumped,itgraduallyturnsintothetensionstate. Inordernottocausethedeflectionoftherootofthechimneyafterthetensionstateisentered,thesteelbarsofthecorrespondingpartsaresymmetricaltobalanceandtheashissolidified.   2.3squatproblem   Sincethepowerdistributionworkshopis5.5mbehindthechimney,therecoilrangemustbestrictlycontrolled. Afteranalysis,theinnerlayerofreinforcingsteelinthenotchareaistaken,andalltheouterreinforcingbarsarecutoff;theouterreinforcingbarsoftheremainingsectorarepartiallysymmetricallycut. Inthisway,itisadvantageoustoformadumpandreducetherecoilpressure. Inaddition,theremainingfan-shapedareawithintherangeofthecentralangleof140°iscontrolledtomaintainastrongsupportingforceofthepressedareaduringthecollapseprocess,andatthesametime,atrapezoidalnotchisadoptedtominimizethepositionoftheorientedwindow.   2.4eccentricityproblem   Afterfieldsurvey,thecenterofthetopofthechimneyis8.2cmawayfromthedesigncenterandthehorizontalprojectiondeflectionangleis17°6′10′′.Althoughthebackwardprojectiondeflectionangleislarger,duetothesmallerdeviation,theradiusis1.9%,calculatethattheresultingadditionalbendingmomentisabout1%ofthepouringmoment.Thus,thepositionoftheremainingsectorisdeflectedby0.5°to0.6°intheoppositedirectionofthecenterofgravityoffset,thatis,thepositionoftheorientationwindowisMove4cmintheoppositedirectionofthecenterofgravityoffset.   3blastingeffect   Theblastinghascompletelyachievedthedesigngoal. Therewasnopre-shootingorrecoilinthechimney,andthelandingvibrationdidnotaffectthenormalproductionofthetwosmeltingplants. Thepositionofthechimneyisdeflectedby1.2°fromthedesignpositionawayfromtheashoutlet(thatis,thedeviationofthegeometriccenterofgravity),thatis,theheadisshiftedtotheleftby2.5mfromthedesignposition. Thereislittledeformationintherangeof40mneartherootofthechimney,especiallyintherangeof10mintheroot;thesemi-circularbarrelgraduallybecomesintherangeof40~60m,andtheuppersemi-circularbarrelin60~90misobviouslycrackedandgraduallyflattened.,90~120mhasnotseenalargearcstructure.    Theairflowgeneratedbythechimneyfloorwasverylarge.Therollingshuttersofthewarehousewereblownoffandrolledintoaball.Thesteelwindowwasblowntotheground,andthewallat136minfrontwasblownoffthewallofthechimneyheadabout5mlong. Fromthesceneofthecollapsedwall,nostructuralblocksorgranuleshitthewall. Theanalysisconsidersthatthehigh-speedairflowinstantaneouslyejectedfromtheinsideofthechimneyandtheairflowgeneratedbytheupperairbeforethechimneyfallstogetheractonthewallabout16minfrontofit,resultinginstrongthrust.   Becausetheprotectionworkisdonewell,allthestackingyardsonthegroundarecoveredwithstrawcurtains,sotherearenocasesofflyingstoneinjuriesandprotectedfacilities.   Throughthisblast,wehavethefollowingexperience:   (1)Thepreciseorientation

Demolition of a 120m High Reinforced Concrete Chimney

(Summary description)Completiontime:October2002 ProjectLocation:EmeishanCity,SichuanProvince Completedunit:InstituteofEngineeringBlasting,SouthwestJiaotongUniversity,SichuanYutaiSpecialEngineeringTechnologyCo.,Ltd. Projecthostandparticipants:ShiFuqiang,DuShaohua Writer:ShiFuqiang   1ProjectOverview   EmeiAluminumGroupElectro-metallurgicalplantchangedthesmeltingprocessinordertostrengthenenvironmentalprotection.The120mreinforcedconcretechimneythathasbeenusedfor10yearsneedstobedismantledassoonaspossible. Thechimneyislocatedinthemiddleofthetwoelectricsmeltingplants.Thetotallengthofthefactoryisabout230m,andthecenterlineofthechimneyis13mawayfrombothsides. Thefactorywallis136maheadofthecollapsedirection,andtherearis9.8mawayfromtheaxisofthechimney.Itisthedistributionworkshopofthesmelter(seeFigure1). Therootofthechimneyhasadiameterof8.62mandatopdiameterof3.82m. Belowthe10melevation,thewallthicknessis50cm,whichisadoubleribarrangement,theexternalribisф20,andtheinnerribisф16. Thelininginsulationbrickhasathicknessof24cmanda5cminsulationlayerinthemiddle. Thetotalweightoftheentirechimneyconcreteisabout591.8m3,theself-weightis1830t(includingthelining),andthecenterofgravityis39.8m. Theelectro-metallurgicalplantcannotstopproductionwhentheprojectrequiresblasting. Demolitionofa120mHighReinforcedConcreteChimney   2Blastingdesignandproblemresearch   2.1Chimneycollapsemodeandblastinggapdesign   Accordingtothesurroundingenvironmentofthechimney,byreferringtotheoriginaldataofthechimneyandthefieldtestresults,thesafetyandreliabilityofthechimneyblastingarefullyconsidered,andthedirectionalcollapseofthechimneyblastingisdetermined. Theblastingnotchisarrangedatadistanceofmorethan50cmfromtheground,andthedesignofthedumpingcenterlineisthesymmetrylineofNo.1andNo.2smelters. Thetrapezoidalnotchisselected,thenotchcorrespondstoacentralangleof220°,andtheoutercircumferenceofthechimneyisL=27.08m,sothenotchlengthL′=16.55m,thenotchheightis2.5m,andtheanglea=40°.   2.2grayoutproblem   Thereisagrayoutletontherightsideofthechimneycollapsedirection,80%coincideswiththeorientationwindow,and20%islocatedintheremainingsectoroutsidethegap. Therefore,itmayaffectthedirectionofthedump. Throughcalculationandanalysis,theashoutletenteringtheremainingsectorisinthecompressionzoneatthemomentofblasting.Whenthechimneyisdumped,itgraduallyturnsintothetensionstate. Inordernottocausethedeflectionoftherootofthechimneyafterthetensionstateisentered,thesteelbarsofthecorrespondingpartsaresymmetricaltobalanceandtheashissolidified.   2.3squatproblem   Sincethepowerdistributionworkshopis5.5mbehindthechimney,therecoilrangemustbestrictlycontrolled. Afteranalysis,theinnerlayerofreinforcingsteelinthenotchareaistaken,andalltheouterreinforcingbarsarecutoff;theouterreinforcingbarsoftheremainingsectorarepartiallysymmetricallycut. Inthisway,itisadvantageoustoformadumpandreducetherecoilpressure. Inaddition,theremainingfan-shapedareawithintherangeofthecentralangleof140°iscontrolledtomaintainastrongsupportingforceofthepressedareaduringthecollapseprocess,andatthesametime,atrapezoidalnotchisadoptedtominimizethepositionoftheorientedwindow.   2.4eccentricityproblem   Afterfieldsurvey,thecenterofthetopofthechimneyis8.2cmawayfromthedesigncenterandthehorizontalprojectiondeflectionangleis17°6′10′′.Althoughthebackwardprojectiondeflectionangleislarger,duetothesmallerdeviation,theradiusis1.9%,calculatethattheresultingadditionalbendingmomentisabout1%ofthepouringmoment.Thus,thepositionoftheremainingsectorisdeflectedby0.5°to0.6°intheoppositedirectionofthecenterofgravityoffset,thatis,thepositionoftheorientationwindowisMove4cmintheoppositedirectionofthecenterofgravityoffset.   3blastingeffect   Theblastinghascompletelyachievedthedesigngoal. Therewasnopre-shootingorrecoilinthechimney,andthelandingvibrationdidnotaffectthenormalproductionofthetwosmeltingplants. Thepositionofthechimneyisdeflectedby1.2°fromthedesignpositionawayfromtheashoutlet(thatis,thedeviationofthegeometriccenterofgravity),thatis,theheadisshiftedtotheleftby2.5mfromthedesignposition. Thereislittledeformationintherangeof40mneartherootofthechimney,especiallyintherangeof10mintheroot;thesemi-circularbarrelgraduallybecomesintherangeof40~60m,andtheuppersemi-circularbarrelin60~90misobviouslycrackedandgraduallyflattened.,90~120mhasnotseenalargearcstructure.    Theairflowgeneratedbythechimneyfloorwasverylarge.Therollingshuttersofthewarehousewereblownoffandrolledintoaball.Thesteelwindowwasblowntotheground,andthewallat136minfrontwasblownoffthewallofthechimneyheadabout5mlong. Fromthesceneofthecollapsedwall,nostructuralblocksorgranuleshitthewall. Theanalysisconsidersthatthehigh-speedairflowinstantaneouslyejectedfromtheinsideofthechimneyandtheairflowgeneratedbytheupperairbeforethechimneyfallstogetheractonthewallabout16minfrontofit,resultinginstrongthrust.   Becausetheprotectionworkisdonewell,allthestackingyardsonthegroundarecoveredwithstrawcurtains,sotherearenocasesofflyingstoneinjuriesandprotectedfacilities.   Throughthisblast,wehavethefollowingexperience:   (1)Thepreciseorientation

Information

Completion time: October 2002

 

Project Location: Emeishan City, Sichuan Province

 

Completed unit: Institute of Engineering Blasting, Southwest Jiaotong University, Sichuan Yutai Special Engineering Technology Co., Ltd.

 

Project host and participants: Shi Fuqiang, Du Shaohua

 

Writer: Shi Fuqiang

 

  1 Project Overview

 

  Emei Aluminum Group Electro-metallurgical plant changed the smelting process in order to strengthen environmental protection. The 120m reinforced concrete chimney that has been used for 10 years needs to be dismantled as soon as possible. The chimney is located in the middle of the two electric smelting plants. The total length of the factory is about 230m, and the center line of the chimney is 13m away from both sides. The factory wall is 136m ahead of the collapse direction, and the rear is 9.8m away from the axis of the chimney. It is the distribution workshop of the smelter (see Figure 1). The root of the chimney has a diameter of 8.62m and a top diameter of 3.82m. Below the 10m elevation, the wall thickness is 50cm, which is a double rib arrangement, the external rib is ф20, and the inner rib is ф16. The lining insulation brick has a thickness of 24cm and a 5cm insulation layer in the middle. The total weight of the entire chimney concrete is about 591.8m3, the self-weight is 1830t (including the lining), and the center of gravity is 39.8m. The electro-metallurgical plant cannot stop production when the project requires blasting.

 

Demolition of a 120m High Reinforced Concrete Chimney

 

  2 Blasting design and problem research

 

  2.1 Chimney collapse mode and blasting gap design

 

  According to the surrounding environment of the chimney, by referring to the original data of the chimney and the field test results, the safety and reliability of the chimney blasting are fully considered, and the directional collapse of the chimney blasting is determined. The blasting notch is arranged at a distance of more than 50cm from the ground, and the design of the dumping center line is the symmetry line of No.1 and No.2 smelters. The trapezoidal notch is selected, the notch corresponds to a central angle of 220°, and the outer circumference of the chimney is L=27.08 m, so the notch length L′=16.55 m, the notch height is 2.5 m, and the angle a=40°.

 

  2.2 gray out problem

 

  There is a gray outlet on the right side of the chimney collapse direction, 80% coincides with the orientation window, and 20% is located in the remaining sector outside the gap. Therefore, it may affect the direction of the dump. Through calculation and analysis, the ash outlet entering the remaining sector is in the compression zone at the moment of blasting. When the chimney is dumped, it gradually turns into the tension state. In order not to cause the deflection of the root of the chimney after the tension state is entered, the steel bars of the corresponding parts are symmetrical to balance and the ash is solidified.

 

  2.3 squat problem

 

  Since the power distribution workshop is 5.5m behind the chimney, the recoil range must be strictly controlled. After analysis, the inner layer of reinforcing steel in the notch area is taken, and all the outer reinforcing bars are cut off; the outer reinforcing bars of the remaining sector are partially symmetrically cut. In this way, it is advantageous to form a dump and reduce the recoil pressure. In addition, the remaining fan-shaped area within the range of the central angle of 140° is controlled to maintain a strong supporting force of the pressed area during the collapse process, and at the same time, a trapezoidal notch is adopted to minimize the position of the oriented window.

 

  2.4 eccentricity problem

 

  After field survey, the center of the top of the chimney is 8.2cm away from the design center and the horizontal projection deflection angle is 17°6′10′′. Although the backward projection deflection angle is larger, due to the smaller deviation, the radius is 1.9%, calculate that the resulting additional bending moment is about 1% of the pouring moment. Thus, the position of the remaining sector is deflected by 0.5° to 0.6° in the opposite direction of the center of gravity offset, that is, the position of the orientation window is Move 4 cm in the opposite direction of the center of gravity offset.

 

  3 blasting effect

 

  The blasting has completely achieved the design goal. There was no pre-shooting or recoil in the chimney, and the landing vibration did not affect the normal production of the two smelting plants. The position of the chimney is deflected by 1.2° from the design position away from the ash outlet (that is, the deviation of the geometric center of gravity), that is, the head is shifted to the left by 2.5 m from the design position. There is little deformation in the range of 40m near the root of the chimney, especially in the range of 10m in the root; the semi-circular barrel gradually becomes in the range of 40~60m, and the upper semi-circular barrel in 60~90m is obviously cracked and gradually flattened. , 90 ~ 120m has not seen a large arc structure.

 

120m高钢筋混凝土烟囱爆破拆除

 

  The airflow generated by the chimney floor was very large. The rolling shutters of the warehouse were blown off and rolled into a ball. The steel window was blown to the ground, and the wall at 136m in front was blown off the wall of the chimney head about 5m long. From the scene of the collapsed wall, no structural blocks or granules hit the wall. The analysis considers that the high-speed airflow instantaneously ejected from the inside of the chimney and the airflow generated by the upper air before the chimney falls together act on the wall about 16m in front of it, resulting in strong thrust.

 

  Because the protection work is done well, all the stacking yards on the ground are covered with straw curtains, so there are no cases of flying stone injuries and protected facilities.

 

  Through this blast, we have the following experience:

 

  (1) The precise orientation of the removal of tall reinforced concrete chimneys should be considered:

 

  1) Accurate measurement and construction of the orientation window;

 

  2) The treatment of the ash outlet must consider the stress change process during the collapse process in order to be treated symmetrically;

 

  3) Accurately measure the geometric eccentricity of the chimney, and do it in mind, and correct it according to the calculation results.

 

  (2) Through the static analysis of the section of the thin-walled ring of the remaining sector chimney, the reasonable area of ​​the compression zone is determined to ensure that the phenomenon of recoil is effectively controlled without large-scale crushing.

 

  (3) Under the meteorological conditions of wind and sun, the effect of wind load on the chimney is generally not considered.

 

  (4) The chimney floor impact problem should be fully considered, and the vibration isolation groove and the buffer belt should be effectively designed to greatly reduce the transmission of vibration waves.

 

  (5) For the narrow space, it is necessary to do a safe diversion and safety protection against air disturbance.

 

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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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