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岩石在静应力状态下的循环冲击实验及损伤特性研究.docx

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岩石在静应力状态下的循环冲击实验及损伤特性研究 Abstract Thestudyinvestigatesthecyclicimpactexperimentanddamagecharacteristicsofrocksunderstaticstressconditions.Throughtheexperiment,thepaperindicatesthedamagemorphologyandmechanismoftherocksunderdifferentimpactfrequenciesandimpactlevels.Theresultsshowthattherocks'damageisevidentwhentheimpactfrequencyandlevelincrease,leadingtodestructionoftherocks'structure.Therefore,thestudyprovidesacomprehensiveunderstandingoftherock'sbehaviorunderdifferentimpactconditions. Introduction Rocksareessentialnaturalresourcesthatplayasignificantroleinvarioussectors,suchasconstruction,mining,andpetroleumexploration.However,rocks'integrityandstrengthcanbenegativelyaffectedbyvariousfactors,suchascyclicloadingandimpactforces.Water,wind,earthquakes,andhumanactivitiescancauserocks'damageandultimatelyleadtofatalaccidents.Therefore,itisessentialtounderstandthedamagecharacteristicsofrocksunderdifferentimpactconditions. Thepaperinvestigatedthecyclicimpactexperimentanddamagecharacteristicsofrocksunderstaticstressconditions.Theresearchaimedtoanalyzethedamagemorphology,mechanism,andstrengthofrocksunderdifferentimpactfrequenciesandimpactlevels. ExperimentalMethodology Thestudyconductedacyclicimpactexperimentonhomogeneoussandstonesamplestoinvestigatethedamagecharacteristicsofrocksunderstaticstressconditions.Theexperimentalmethodincludesthefollowingsteps: 1.SamplePreparation:Thepapercollectedsixcylindricalsandstonesampleswithadiameterof50mmandaheightof100mm,representingthenaturalcharacteristicsofrocks. 2.StaticLoading:Thepaperappliedastaticforceonthesamplesusingahydraulicjack,compressingthesampleswithastaticstressof20MPa. 3.Impactloading:Thepaperusedarepeatedimpacttestertoconductthecyclicimpactexperiment.Thetestercompressedasteelcylindricalrodontotherocksurfacewithdifferentfrequenciesandimpactlevels.Theimpactfrequencyrangedfrom1Hzto20Hz,andtheimpactlevelrangedfrom100Nto500N. 4.Damagemorphology:Thepaperusedadigitalcameratocapturethedamagemorphologiesofthesamplesunderdifferentimp