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Article Navigation >  Journal of Mining Science and Technology  > 2020  >  5(3): 278-283
CaiYongbo, WangKai, XuChao. Comparative experimental study on deformation and damage characteristics of single coal rock and primary coal-rock combination[J]. Journal of Mining Science and Technology, 2020, 5(3): 278-283.
Citation: CaiYongbo, WangKai, XuChao. Comparative experimental study on deformation and damage characteristics of single coal rock and primary coal-rock combination[J]. Journal of Mining Science and Technology, 2020, 5(3): 278-283.
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Comparative experimental study on deformation and damage characteristics of single coal rock and primary coal-rock combination

  • SchoolofEmergencyManagementandSafetyEngineering,ChinaUniversityofMining&Technology-Beijing,Beijing100083,China; 2.BeijingKeyLaboratoryforPreciseMiningofIntergrownEnergyandResources,Beijing100083,China

  • Publish Date: 2020-06-28
    Abstract
  • Thestudyofthedeformationandfailurelawsintheloadingprocessofcoal-rockcombination samplesareveryimportanttorevealthedynamicmechanismofminedisaster.Inthisstudy,themechanicaldeformationcharacteristicsofprimarycoal-rockcombination,artificialcoal-rockcombination,single coalandsinglerockwereanalyzedandobtainedunderuniaxialloadingconditions.Meanwhile,thedamageandfailurelawsofprimarycoal-rockcombinationwerepreliminarilyexploredbycollectingtheacousticemission(AE)behaviorinformationofsamplesduringloadingprocess.Throughcomparativeanalysis,itisfoundthat:①Theinterfacedifferenceofcoal-rockcombinationhasgreatinfluenceonthe mechanicalandAEcharacteristicsofcoal-rockcombination;②Theorderofuniaxialpeakstrengthof foursamplesis:rock>artificialcoal-rockcombination>primarycoal-rockcombination>coal;③The loadingdeformationandpeakstrengthofthecombinationbodyareinfluencedbymanyfactors,suchas interfaceconditions,elasticmodulusdifferenceofdifferentmediaandsizeeffectofmedia;④Underthe influenceofprimaryinterface,thefracturedevelopmentandpenetrationintheprimarycoal-rockcombinationisrelativelyactiveduringtheloadingyieldfailurestage,andtheearlydamagemainlyoccursin theprimarycoal-rockcombinationorthecoalandrockneartheinterfaceofcombination.
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