Numerical Simulation on Mechanical Characteristics of Deep-hole Blast in Soft and Loose Coal-beds

CAI Feng1234 LIU Ze-gong12 HUANG Wen-yao12

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Numerical Simulation on Mechanical Characteristics of Deep-hole Blast in Soft and Loose Coal-beds

机译：松软煤层深孔爆破力学特性的数值模拟

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Deep-holeblastingisanidealtechniquetoincreasepermeabilityofcoal-bedsandisappliedinmoreandmorehigh-gascoalminesinrecentyears,buttherearefewtheoreticstudiesonblastingincoal-beds.Basedontheparametersofspecialexplosivefordeep-holeblastandarrangementofblastboreholeandcontrolboreholes,themechanismofdeep-holeblastincoal-bedissimulatedandstudiedusingnumericalsimulationmethod.Thenumericalmodelforsimulatingcylindricalexplosiveblastisbuilt,andthedamagerangeincoal-bedandblastingstresswave'simpactoncoal-bedisstudied.Theresearchingresultsshowthatthemaximumdamageradiusis40cm,andeffectivegasdrainageradiusincreasestoalmost10m,andgasdrainageincreasingresultsincoal-bedwithin4maroundblastboreholearesignificant.Thedisplacementfieldofcontrolboreholesaresimulatedandstudied,andthesimulatedresultsisconsistentwithgasdrainagedataafterblast.Theresearchingresultsprovidetheoreticsupportforincreasingpermeabilityofsoftandloosecoal-bedsbydeep-holeblasttechnique.

机译：深holeblastingisanidealtechniquetoincreasepermeabilityofcoal-bedsandisappliedinmoreandmorehigh-gascoalminesinrecentyears，buttherearefewtheoreticstudiesonblastingincoal-beds.Basedontheparametersofspecialexplosivefordeep-holeblastandarrangementofblastboreholeandcontrolboreholes，themechanismofdeep-holeblastincoal-bedissimulatedandstudiedusingnumericalsimulationmethod.Thenumericalmodelforsimulatingcylindricalexplosiveblastisbuilt，andthedamagerangeincoal-bedandblastingstresswave'simpactoncoal-bedisstudied.Theresearchingresultsshowthatthemaximumdamageradiusis40cm，andeffectivegasdrainageradiusincreasestoalmost10m，andgasdrainageincreasingresultsincoal-bedwithin4maroundblastboreholearesignificant.Thedisplacementfieldofcontrolboreholesaresimulatedandstudied，andthesimulatedresultsisconsistentwithgasdrainagedataafterblast.Theresearchingresultsprovidetheoreticsupportforincreasingpermeabilityofsoftandloosecoal-bedsbydeep-holeblasttechnique。

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《The electronic journal of geotechnical engineering》 |2013年第2013期|共页
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CAI Feng1234 LIU Ze-gong12 HUANG Wen-yao12;
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Numerical Simulation on Mechanical Characteristics of Deep-hole Blast in Soft and Loose Coal-beds

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