不同含水狀態(tài)花崗巖破裂過(guò)程時(shí)頻分析

不同含水狀態(tài)花崗巖破裂過(guò)程時(shí)頻分析摘要：在地球科學(xué)領(lǐng)域中，花崗巖破裂過(guò)程的頻分析是一個(gè)重要的研究方向。本文通過(guò)對(duì)不同含水狀態(tài)的花崗巖破裂過(guò)程進(jìn)行頻譜分析，探討了其破裂機(jī)理及其影響因素。研究結(jié)果表明，含水狀態(tài)會(huì)影響花崗巖的破裂行為，而頻分析可以有效地解釋花崗巖破裂的動(dòng)力學(xué)特征。關(guān)鍵詞：花崗巖；破裂；頻譜分析；含水狀態(tài)；動(dòng)力學(xué)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.楊新華等.花崗巖破裂動(dòng)力學(xué)機(jī)制研究[J].巖土力學(xué),2010.2.ChenR,JingH.Dynamicanalysisofgranitefractureevolutionanddamageprocess[J]