不同含水状态花岗岩破裂过程时频分析

不同含水状态花岗岩破裂过程时频分析摘要：在地球科学领域中，花岗岩破裂过程的频分析是一个重要的研究方向。本文通过对不同含水状态的花岗岩破裂过程进行频谱分析，探讨了其破裂机理及其影响因素。研究结果表明，含水状态会影响花岗岩的破裂行为，而频分析可以有效地解释花岗岩破裂的动力学特征。关键词：花岗岩；破裂；频谱分析；含水状态；动力学特征Abstract:InthefieldofEarthScience,frequencyanalysisofgranitefractureprocessisanimportantresearchdirection.Thispaperexploresthefracturemechanismanditsinfluencingfactorsofgraniteindifferentwatercontentstatesthroughfrequencyspectrumanalysis.Theresultsshowthatthewatercontentstatecanaffectthefracturebehaviorofgranite,andfrequencyanalysiscaneffectivelyexplainthedynamiccharacteristicsofgranitefracture.Keywords:Granite;Fracture;Frequencyspectrumanalysis;Watercontentstate;DynamiccharacteristicsIntroduction:GraniteisoneofthemostwidelydistributedrocksonEarth.Itsstrongmechanicalpropertiesmakeitwidelyusedinconstruction,mining,andotherareas.However,thefractureofgranitecancauseeconomiclossesandevenleadtodisasters,suchaslandslidesandrockfall.Therefore,studyingthefracturemechanismofgraniteishighlyimportant.Graniteisaheterogeneousrockwithacomplexcompositionandstructure.Itsfractureprocessisaffectedbymanyfactors,suchastheconfiningpressure,watercontent,andloadingrate.Thewatercontentofrocksplaysanimportantroleinthefractureprocess,whichcanchangetherock'smechanicalpropertiesandaffectthestressstateoftherock.Therefore,itisnecessarytoinvestigatetheeffectofwatercontentonthefracturebehaviorofgranite.Frequencyspectrumanalysis,asapowerfultoolforstudyingdynamiccharacteristics,caneffectivelyrevealthedynamicmechanismofgranitefracture.Throughthestudyofthefrequencyspectrumofdifferentwatercontentstatesofgranite,thefracturebehaviorofgraniteunderdifferentconditionscanbeexplored.Methods:Thestudyadoptstheuniaxialcompressiontestofgranitetosimulatethefractureprocess,anda100Hzaccelerometerisusedtocollectthevibrationsignalatthetopofthespecimenduringthetest.Thewatercontentofgranitespecimensiscontrolledbydryinginanovenatdifferenttemperatures.Thefrequencyspectrumanalysisofthevibrationsignalsisperformed,andthecorrespondingpowerspectraareobtained.Results:Thefrequencyspectraofgranitewithdifferentwatercontentsshowdifferentcharacteristics.Generally,thehigherthewatercontent,thelowertheresonantfrequencyofthegranitespecimens,indicatingthatthewatercontenthasasignificantimpactonthedynamiccharacteristicsofgranitefracture.Thepresenceofwatercanincreasetheinternalfrictionanddampingoftherock,resultinginmoreenergyconsumptionduringthefractureprocess.Atthesametime,thestudyfoundthatthemodeoffractureofgraniteunderdifferentwatercontentconditionsisalsodifferent.Thegranitewithlowwatercontenttendstoexhibitamodeofsinglecrackpropagation,whilethegranitewithhighwatercontenttendstoexhibitamodeofmultiplecrackspropagation.Thisisbecausethepresenceofwatercanpromotetheformationandpropagationofmicro-cracks,weakeningthestrengthoftherockandpromotingtheoccurrenceofmultiplecracks.Conclusion:Thisstudyofthefrequencyanalysisofthegranitefractureprocessindifferentwatercontentstatesprovidesadeepunderstandingofthedynamicbehaviorofgranitefracture.Theresearchshowsthatthewatercontenthasasignificantimpactonthefrequencyresponseofgraniteduringthefractureprocess,andcanaffectthemodeoffracturepropagation.Thisresearchprovidesatheoreticalbasisforthepreventionandcontrolofrockburstaccidentsinengineeringandminingactivities.References:1.杨新华等.花岗岩破裂动力学机制研究[J].岩土力学,2010.2.ChenR,JingH.Dynamicanalysisofgranitefractureevolutionanddamageprocess[J]