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基于UDEC的综放面顶板运移规律分析.docx

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基于UDEC的综放面顶板运移规律分析 Title:AnalysisoftheMovementLawofComprehensiveCavingfortheOverlyingStratabasedonUDEC Introduction: Thecomprehensivecavingmethodiswidelyusedinundergroundminingtoensurethesafetyandefficientexploitationofcoalresources.Understandingthemovementpatternsoftheoverlyingstrataiscrucialforsuccessfulimplementationofthecavingmethod.ThispaperaimstoanalyzethemovementlawoftheoverlyingstrataincomprehensivecavingusingtheUniversalDistinctElementCode(UDEC). 1.OverviewofComprehensiveCaving: Comprehensivecavingisaminingmethodwherethecoalseamiscavedcompletelytothesurfaceundertheweightoftheoverlyingstrata.Theextractionprocessinvolvessequentiallyexcavatingthecoalseam,allowingtherooftocave,andcontrollingthecavingprocesstoensuresafetyandefficiency.Understandingthemovementpatternsoftheoverlyingstrataduringthecavingprocessisessentialfordesigningsupportsystemsandcontrollingpotentialhazards. 2.UDECModeling: UDECisadiscreteelementsoftwarecommonlyusedforanalyzingandsimulatingrockmechanicsproblems.Itallowsforthediscretemodelingofdiscontinuitiesandfracturesinrockmasses,makingitsuitableforanalyzingthemovementofoverlyingstrataduringcomprehensivecaving.TheinputparametersfortheUDECmodelincludematerialproperties,boundaryconditions,andexcavationsequence. 3.MaterialPropertiesandBoundaryConditions: Thematerialpropertiesofrockandcoalstrata,suchasYoung'smodulus,Poisson'sratio,cohesion,andinternalfrictionangle,areessentialinputsfortheUDECmodel.Theseparameterscanbeobtainedthroughlaboratorytestsandsiteinvestigations.Inaddition,boundaryconditions,suchasverticalstress,horizontalstress,andexternalloads,shouldbeconsideredtoaccuratelysimulatethemovementoftheoverlyingstrata. 4.AnalysisofMovementLaw: OncetheUDECmodelisestablished,itcanbeusedtosimulatethemovementoftheoverlyingstrataduringcomprehensivecaving.Themodelconsiderstheinterplaybetweenstressdistribution,straindevelopment,andfractureinitiationandpropagation.Bymonitoringthedisplacement,stressdistribution,andstraindevelopmentofkeypointsinthemodel,t