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Chamber blasting of limestone orphans

Chamber blasting of limestone orphans

(Summary description)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

Chamber blasting of limestone orphans

(Summary description)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

Information

Completion time: April 2004

 

  Project Location: Mawei Township, Debao County, Guangxi

 

  Completed unit: Guangxi Geology Construction Engineering Development Center

 

  Project host and participants: Zhao Mingte, Tan Zhimin, Qi Jingyin, Wang Hong

 

  Contributed by Zhao Mingte

 

  1 Project Overview

 

  1.1 Engineering and geological overview

 

  In order to develop the Guangxi Bauxite Mine, Guangxi Huayin Aluminum Co., Ltd. decided to build an alumina plant in Maji Township, Debao County, Guangxi. According to the overall arrangement of the project construction, the owner requested within one month (ie March 18 to 4, 2004). On the 18th of the month, the blasting task of eight limestone orphan chambers in the plant area was completed.

 

  1.2 Topography and geology in the detonation area

 

  The four limestone mountains in the aluminum plant site are towering and steep lone peaks. The slope angles of the slopes are all greater than 45°. Most of the surface of the mountain is exposed limestone, with scattered local vegetation and lithology from thick to thick thick limestone. The lithology is relatively hard, f=7~lO, the rock stratum is 165/NE, the rock layer dip is 27°, the surface of the rock mass is weakly weathered, the joint fissures are developed, and the solitary peaks are all developed with caves, their sizes are different, and the shape is irregular. Most of them develop in the middle and lower parts of the mountain, and there is no water in the hole. There are two groups of fault-fracture zones near the east-west direction, with a width of l~3m. The fractured zone of the fault fracture zone extends from the top to the foot of the mountain. The fault zone is a keratinous weak silicified rock.

 

  No. 2 is 430m long, 220m wide and 63.1m high, with a blasting capacity of 380,000m3; No.3 isolated peak is 240m long, 200m wide, 72.92m high, with a blasting capacity of 250,000m3; No.4 isolated peak is 280m long and wide 120m, height 52m, blasting quantity 90,000m3; No.8 solitary peak length 260m, width 110m, height 45.2m, blasting quantity 110,000m3. 4 solitary peaks require blasting floor elevation 690m, total blasting capacity is 83 Million m3.

 

  1.3 The surrounding environment of the explosion area

 

  The blast zone is a typical karst landform, which is a relatively flat depression. It is surrounded by undulating peak clusters. Four orphan peaks are located in the center of the valley. They are distributed in a shape of a figure, among which are the 3rd, 4th and 2nd peaks. The distance is 60-80m, the 8th isolated peak is far apart, and the distance between the 4th peak is 500m. There are villages around the four isolated peaks. The nearest distance to the village is 80m (multiple objects), and the rest are above 200-250m. In addition to the residential areas, there are high-voltage lines and communication stations. (structure) and facilities, the distance from the explosion zone is about 400 ~ 500m (as shown in Figure 1).

 

Chamber blasting of limestone orphans

 

  1.4 Technical requirements for blasting design

 

  Guangxi Huayin Aluminum Co., Ltd. puts forward the following requirements for the design of chamber blasting technology:

 

  (1) Blasting elevation: all broken above 690m elevation.

 

  (2) The rock mass after blasting is less than 300mm, accounting for 60%; 300-600mm or more, 30%; 600mm or more, accounting for 10%.

 

  (3) Project duration: March 18 to April 18, a total of 30 days.

 

  (4) No harm to the houses and other facilities around the explosion area.

 

  2 blasting design

 

  2.1 Blasting plan

 

  The purpose of this blasting is to flatten 4 orphan peaks, and the blasting fragments have grading requirements. The energy distribution of the strip-shaped drug room is uniform, and the block and grading control is better. At the same time, the lower part of the four isolated peaks are considered. The thick layer and the thick layer of limestone, with the middle layer of limestone interposed therebetween, so the concentrated chamber blasting is used in the thick layer section, and the blasting scheme combining the strip medicine chamber and the concentrated medicine chamber is generally adopted. In order to effectively protect the building (structure) around the explosion area, the drug room is arranged in layers, the upper drug room is designed to strengthen the loose blasting, the lower drug room is loose blasting, and the minimum resistance line is controlled within 20m. The detonating tube is used to detonate the network. The blasting schemes of the four solitary peaks are as follows:

 

  (1) No. 2 orphan peak is elliptical, with little change in topography. The middle and upper parts are medium-thick layered limestone, and the lower part is thick to thick thick layered limestone. Two layers of drug room are arranged, and the upper layer is strip-shaped medicine. The room is reinforced by loose blasting, and the lower layer is loose blasting of concentrated drug room.

 

  (2) The No. 3 orphan peak is a nearly vertical cylindrical peak, and the lithology is a medium thick layered limestone. Three layers of drug chambers are arranged. The upper two layers of the drug chamber are strip-shaped drug chambers, which are collapsed and blasted. Concentrated drug room loosening blasting.

 

  (3) The 4th peak is similar to the tiger-like shape. The first (south end) is a medium-thick layered limestone, the lower part and the north part are thick and thick thick layered limestone, the south is set up with two layers of medicine rooms, and the north is set with a layer of medicine. Room, using concentrated drug room loose blasting.

 

  (4) No.8 orphan peak is similar to diamond shape, lithology is medium thick layered limestone, 80m on the northwest side of the mountain is multi-objective, most of the houses are mud brick structure, two layers of drug room are arranged, and the strip-shaped drug room is loosened. blasting.

 

  2.2 Design principles

 

  The chamber blasting period is tight, the surrounding environment and geological structure of the explosion area are very complicated, and the karst cave is developed, which brings great difficulties to design and construction. In order to achieve good blasting effect and ensure the safety of surrounding buildings during blasting, The design principle of multi-channel, multi-drug, small dose, multi-layer and multi-row millisecond delay detonation.

 

  3 main technical parameters

 

  3.1 Minimum resistance line W and high ratio W/H

 

  The shape value is within 20m, and W/H is 0.6 to 0.8, which is 0.7.

 

  3.2 drug room row spacing

 

  Br=W/sinr

 

  Where r is the radial rupture of the front or lower chamber, (°), according to experience, r = 65 ° ~ 70 °.

 

  3.3 drug coating interval

 

  Bc=(1.2~1.5)W

 

  3.4 Unit Explosive Consumption K

 

  Here, the standard throwing blasting dose coefficient is used, and K=1.5kg/m3 is determined according to the previous chamber blasting with similar lithology and geological structure characteristics.

 

  3.5 Loose blasting unit consumption amount g

 

  The blast q is taken as one-third of the unit dose K, that is, q=O.5kg/m3.

 

  3.6 Blasting effect index腮

 

  Loose blasting takes n=0.7, and strengthens loose blasting to take n=0.85.

 

  3.7 Charge port calculation

 

  3.7.1 Loose blasting

 

  (1) Concentrated drug room:

 

  Q=e·g·W3

 

  (2) Strip medicine room

 

  Q=e·q·W2·L

 

  Where e is the explosive conversion factor;

 

  L - strip drug chamber calculates the length of the charge, m.

 

  3.7.2 Strengthening loosening

 

  (1) Concentrated drug room:

 

  Q=e·K·W3 (0.4+0.6n)

 

  (2) Strip medicine room:

 

  Q=e·K·W2·L(0.4+O.6n)/0.55(n+1)

 

  3.7.3 Concentrated dose at the end of the strip-shaped drug room 9

 

  Q=e·K2·(0.4+O.6n)·k·W2

 

  Where W2 - the lateral minimum resistance line of the concentrated drug room;

 

  K2——The conversion coefficient of the concentrated drug package at the end, K2=0.5~0.7, the relevant parameters of each solitary peak and the main technical and economic indicators are shown in Table 1.

 

Chamber blasting of limestone orphans

 

  4 detonation network design

 

  In this chamber blasting, the two sections are independent detonation networks, which are detonated in the order of 3 s in the same detonating station. The standard section is determined according to the distance between the mountains. The order of detonation is from the far and near to No. 8, No. 4, No. 3 and No. 2.

 

  A 1:1 network simulation test was performed before charging.

 

  In order to ensure the reliability of the detonation network, a double detonation network is used, and a non-electrical conduit network is connected in parallel with the detonating cord network. The non-electrical conduit network adopts a cluster connection mode, and each isolated peak adopts a ring-shaped bidirectional parallel network.

 

  The millisecond spacing between the individual peaks is: No.8, No.4, Lonely Peak, l, No.3, Lonely Peak, Section 5, No.2, Lonely Peak, Section 8.

 

  The detonation sequence in each orphan peak is: upper layer drug room → middle layer drug room → lower layer drug room.

 

  Two sets of independent networks were launched with three electric detonators, and the detonation station was set at 1km from the explosion point.

 

  5 Blasting safety technology and accident prevention measures

 

  Because the two sections of the chamber blasting (eight lonely peaks) are simultaneously detonated, and the isolated peaks are scattered, the geological structure is complex, and there are villages and buildings (structures) around them, which have high requirements for blasting safety technology. To reduce blasting vibration and avoid flying stone damage, the following measures were taken.

 

  5.1 Security alert

 

  The owners, local governments, and construction units jointly established a blasting headquarters to coordinate and direct the blast.

 

  5.2 Precautions for blasting flying stones

 

  Chamber blasting should accurately measure the topography, clarify the geological structure and structure, and ensure the length and quality of the packing according to the design requirements. This is an important measure to avoid the occurrence of flying stones. Before construction and during the construction process, it is required to:

 

  (1) Ensure accurate measurement of topography and guiding direction, length and position of the drug room, laying a good foundation for blasting success.

 

  (2) Carry out detailed geological surveys and surveys on the blasting area, especially the detailed survey and investigation of fault structures and caves in the blasting area, and make a description record.

 

  5.3 Preventive measures for blasting earthquakes

 

  (1) Optimize the blasting design, adopt the blasting scheme of multi-drug and small dose, the minimum resistance line is controlled within 20m, most of them are 15~18m; the single loudest medicine room is 12t.

 

  (2) According to the previous research results and experience, the upper, middle and lower drug rooms of the same mountain and the left and right drug rooms in the same layer are all detonated by millisecond delay.

 

  (3) Strictly establish the detonation sequence, and use a millisecond delay between the mountains to detonate.

 

  6 Blasting effect and experience, experience

 

  6.1 Blasting effect

 

  The blasting detonated at 11:38 am on April 18, 2004. After the blasting, no long-distance flying stones were found. The distribution of stone powder and small gravel in the direction of individual guides was separated from the guide. About 35m, after the explosion of each mountain, the stone spreads along the edge of the mountain foot, and the part is fan-shaped. The distribution length is about 25~30m. The broken block is not only the thick layer of the lower part of the 2nd and 4th mountain, but also the fragmentation degree. The department is relatively uniform.

 

  The blasting did not cause any damage to the surrounding village houses. The original dangerous houses were still in their original state after the explosion.

 

  6.2 Experience and experience

 

  (1) In the absence of domestic precedents, the surrounding environment and geological structure are complex, and the chamber blasting of the simultaneous detonation of the Lonely Peak Group has been successfully completed, providing a precedent for the implementation of similar blasting projects in the future.

 

  (2) According to the surrounding environment of the explosion area, the topography and geological structure characteristics of each orphan peak, it is safe and reliable to use multi-drug room, small drug package, multi-layer multi-row millisecond delay detonation, and can effectively reduce the blasting vibration intensity.

 

  (3) The theory holds that a strip-shaped drug chamber refers to a form of a drug room whose charge length is greater than or equal to the shape value. In this blasting, due to the millisecond delay segmentation to control the needs of a single drug room, the strip-shaped drug room we arranged did not meet this requirement, but from the practical point of view, the standard strip-shaped drug room and its charging site were used. The energy is evenly distributed, the blasting effect is better than the concentrated drug room, and the bulk yield is less.

 

  (4) This blasting studied in detail the geological structure of each orphan in the explosion area and the different types of rock formation and structural structure, and according to different rock formation and structure, reasonable selection of the type of drug room, the location of the drug room and Blasting parameters. K=0.6kg/m3, n=0.75, and W≤20m are effective for this blasting selection.

 

  (5) Blasting vibration has always been a safety problem in chamber blasting. The goal is to ensure the safety of buildings around the explosion area on the premise of realizing the blasting effect. The blasting of the group's solitary peak chamber is large, and the network is complex. It is a reasonable millisecond delay between the mountain and the mountain to minimize the blasting effect. If the millisecond delay is unreasonable, it will cause the segments to overlap each other and cause damage to the buildings around the explosion zone. The reasonable interval of the millisecond delay detonation should meet the requirements that the seismic waves formed by the blasting of each section do not overlap each other. Therefore, the interval between the middle and lower parts of the drug chamber is shorter than the interval between the upper and lower drug chambers. Both are equal to or greater than 100ms.

 

  (6) The medium of the blasting is all limestone, but the occurrence of each mountain rock layer and the thickness of the rock layer and the degree of weathering between the layers are quite different. According to the post-explosion inspection, the layered limestone bedrock structure is relatively complete and the blastability is good. The broken piece is small and uniform. On the contrary, in the thick thick layer of limestone, the weathering is strong between the layers, and the surface is superimposed. The explosive energy of the explosive acts only on the crushing ring. The rock formation outside the crushing circle has little effect, and the upper part of the chemical chamber is smoothed. The layer slides to collapse and the bulk rate is high. Therefore, the rock formation with strong weathering between layers is not suitable for chamber blasting.

 

  Excerpted from "China's Typical Blasting Engineering and Technology"

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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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