ZhaoYang1, ZhouHongwei1, LiuDi1, et al. The study of the relation model between elastic modulus and porosity in deep coal seam roof sandstone[J]. Journal of Mining Science and Technology, 2019, 4(3): 204-212.
Citation: ZhaoYang1, ZhouHongwei1, LiuDi1, et al. The study of the relation model between elastic modulus and porosity in deep coal seam roof sandstone[J]. Journal of Mining Science and Technology, 2019, 4(3): 204-212.

The study of the relation model between elastic modulus and porosity in deep coal seam roof sandstone

  • Rockmass*selasticmodulusiscloselyrelatedtoitscompositions,innerstructuralcharacteris⁃ ticsandstress⁃strainstate*ByassumingtheelasticmodulusofporetRockmass*selasticmodulusiscloselyrelatedtoitscompositions,innerstructuralcharacteris⁃ ticsandstress⁃strainstate*Byassumingtheelasticmodulusofporethatasapartofrockiszero,arela⁃ tionalmodelbetweentheelasticmodulusofthewholerockandcomponentaswellasvolumefractions wasderivedinthispaper*Theparametersinthismodelofdeeproofsandstoneweredeterminedbythe experimentalmeasurementsofdifferentbrittlerockssuchasgranite,deepcoalrock,roofsandstoneand highcementationsandstonepreparedbyartificialproportioning*Inaddition,theacousticemissionexper⁃ imentofcyclicloadingandunloadingondeeproofsandstonewasconductedtodeterminethechange rulebetweenelasticmodulusintherockelasticphaseandporosity*Theexperimentalresultsshowthat theaverageerrorbetweenthetheoreticalcalculatedvalueandexperimentalmeasurementvalueofthee⁃ lasticitymoduluswas2*11%,whichprovedthatrelationmodelbetweenelasticmodulusandporosity understresswasapplicable* hatasapartofrockiszero,arela⁃ tionalmodelbetweentheelasticmodulusofthewholerockandcomponentaswellasvolumefractions wasderivedinthispaper*Theparametersinthismodelofdeeproofsandstoneweredeterminedbythe experimentalmeasurementsofdifferentbrittlerockssuchasgranite,deepcoalrock,roofsandstoneand highcementationsandstonepreparedbyartificialproportioning*Inaddition,theacousticemissionexper⁃ imentofcyclicloadingandunloadingondeeproofsandstonewasconductedtodeterminethechange rulebetweenelasticmodulusintherockelasticphaseandporosity*Theexperimentalresultsshowthat theaverageerrorbetweenthetheoreticalcalculatedvalueandexperimentalmeasurementvalueofthee⁃ lasticitymoduluswas2*11%,whichprovedthatrelationmodelbetweenelasticmodulusandporosity understresswasapplicable*
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