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Volume 12 Issue 2
Jun.  2001
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Wu Li, Chen Jianping. Study on Smooth~Blasting Results in Jointed and Fractured Rock. Journal of Earth Science, 2001, 12(2).
Citation: Wu Li, Chen Jianping. Study on Smooth~Blasting Results in Jointed and Fractured Rock. Journal of Earth Science, 2001, 12(2).

Study on Smooth~Blasting Results in Jointed and Fractured Rock

  • Received Date: 2018-07-15
  • Rev Recd Date: 2018-07-15
  • Publish Date: 2018-07-15
  • Factorsthataffectblastingresultsmaybegroupedintothosefactorsthatcanbecontrolledandthosethatcannotbecontrolled.Thecontrollablefactorsincludeexplosiveproperties,initiationtiming,andblastgeometry.Theuncontrollablefactorscomprisetherock’snaturalstructures,suchasjointsandfractures,andtheproperties,suchaselasticconstants,densityandstrength.Amongthese,theinfluenceofrockstructuralplanesoftencontributesahighdegreeofvariabilitytoblastingresults.Thispaperpresentsatheoreticalanalysisofrockstructuralplaneinfluencesonsmooth~blastingresultsbasedonelasticityandstresswavepropagationtheorywithanemphasisonsmoothblastingtechniques.Twotypesofsimulatedexperimentsinlab(usingstrainandacousticemissionmeasurements)areusedtoverifythetheoreticalanalysis.Theresultsshowthatitisdifficulttoachievesmoothblastingresultswhentheanglebetweenthenaturalrockstructuralplanesandtheblast~inducedfractureplanesrangesfrom10to60°.Amongtheseangles,30°istheleastdesirableangletoproduceasmoothwall.Forangleslessthan10°andgreaterthan60°,theinfluenceofrockstructuralplanesonblastingresultscanbeignored.
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通讯作者: 陈斌, bchen63@163.com
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Study on Smooth~Blasting Results in Jointed and Fractured Rock

Abstract: Factorsthataffectblastingresultsmaybegroupedintothosefactorsthatcanbecontrolledandthosethatcannotbecontrolled.Thecontrollablefactorsincludeexplosiveproperties,initiationtiming,andblastgeometry.Theuncontrollablefactorscomprisetherock’snaturalstructures,suchasjointsandfractures,andtheproperties,suchaselasticconstants,densityandstrength.Amongthese,theinfluenceofrockstructuralplanesoftencontributesahighdegreeofvariabilitytoblastingresults.Thispaperpresentsatheoreticalanalysisofrockstructuralplaneinfluencesonsmooth~blastingresultsbasedonelasticityandstresswavepropagationtheorywithanemphasisonsmoothblastingtechniques.Twotypesofsimulatedexperimentsinlab(usingstrainandacousticemissionmeasurements)areusedtoverifythetheoreticalanalysis.Theresultsshowthatitisdifficulttoachievesmoothblastingresultswhentheanglebetweenthenaturalrockstructuralplanesandtheblast~inducedfractureplanesrangesfrom10to60°.Amongtheseangles,30°istheleastdesirableangletoproduceasmoothwall.Forangleslessthan10°andgreaterthan60°,theinfluenceofrockstructuralplanesonblastingresultscanbeignored.

Wu Li, Chen Jianping. Study on Smooth~Blasting Results in Jointed and Fractured Rock. Journal of Earth Science, 2001, 12(2).
Citation: Wu Li, Chen Jianping. Study on Smooth~Blasting Results in Jointed and Fractured Rock. Journal of Earth Science, 2001, 12(2).

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