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循环荷载下裂隙复合煤岩体力学试验研究 Title:ExperimentalStudyontheMechanicalBehaviorofFracturedCompositeCoal-RockMassesunderCyclicLoading Abstract: Coal-bearingformationsoftenpossessinherentgeologicaldiscontinuitiessuchasfracturesandjointplanes,whichsignificantlyinfluencethemechanicalresponseofcoal-rockmasses.Inthisstudy,themechanicalbehavioroffracturedcompositecoal-rockmassesundercyclicloadingwasinvestigatedthroughacomprehensiveexperimentalapproach.Theaimwastoanalyzetheeffectsofcyclicloadingonthefracturedeformation,strengthevolution,andenergydissipationcharacteristicsofthecoal-rockmass.Theresultsobtainedfromthisstudyprovidevaluableinsightsintotheresponseoffracturedcoal-rockmassesundercyclicloadingandcancontributetowardsthedevelopmentofefficientstrategiesforcoalminingandrockengineering. 1.Introduction: 1.1Background: Coalminingoperationsrequiredetailedunderstandingofthemechanicalbehaviorofthecompositecoal-rockmasses,especiallyundercyclicloadingconditions.Thecyclicloading,inducedbymining-inducedstresschanges,cancausesignificantdeformationanddamagetothecoal-rockmasses.Thiscanresultinmineaccidents,suchasroofcollapsesandrockbursts,posingathreattothesafetyofminingpersonnelandequipment. 1.2Objectives: Thisstudyaimstoinvestigatethemechanicalbehavioroffracturedcompositecoal-rockmassesundercyclicloading.Thespecificobjectivesareto: -Evaluatethedeformationcharacteristicsandfailurepatternoffracturedcoal-rockmassesundercyclicloadingconditions. -Investigatethestrengthevolutionoffracturedcoal-rockmassesduringcyclicloading. -Analyzetheenergydissipationcharacteristicsoffracturedcoal-rockmassesundercyclicloading. 2.ExperimentalMethodology: 2.1SamplePreparation: Fracturedcompositecoal-rocksampleswerecollectedfromarepresentativecoalmineandpreparedforlaboratorytesting.Emphasiswasgiventomaintainingtheintrinsicfracturesandjointplanesofthecoal-rocksamplestosimulatethenaturalconditions. 2.2TestingSetup: Acyclicloadingsystemwasdesignedandemployedforthisexperimentalstudy.Theloadingsystemallowedtheapplicationofs