基于声发射监测的含水岩石动态损伤演化过程试验研究.docx

基于声发射监测的含水岩石动态损伤演化过程试验研究
Abstract
Thedynamicdamageevolutionprocessofwater-bearingrocksbasedonacousticemissionmonitoringwasstudiedthroughexperiments.Thestudywasconductedtounderstandthebehaviorofrocksunderchangingstressconditions,withspecialattentiontotheeffectofwatercontent.
Theexperimentalstudyinvolvedtwotypesofrocks,namely,sandstoneandgranite,havingdifferentwatercontents.Thesamplesweresubjectedtodynamicloadingconditionsusingauniversaltestingmachine,andtheacousticemissionsignalsweremonitoredcontinuouslyduringtheloadingprocess.
Theresultsshowedthattheacousticemissionparameters,suchastheeventcount,amplitude,andenergy,increasedwithanincreaseintheappliedstress,andthewatercontenthadasignificanteffectontheacousticbehavioroftherocksamples.Thesandstonesamplesshowedahighersensitivitytowatercontentchangesascomparedtogranitesamples.
Furtheranalysisoftheacousticemissiondatausingdifferentsignalparametersshowedthattheoccurrenceofdamageintherocksamplessignificantlyaffectedthesignalcharacteristics.Thepeakfrequencyanddurationoftheacousticemissionsignalswerefoundtobedirectlyrelatedtothelevelofdamageintherocksamples.
Thisstudyhasimplicationsforthedevelopmentofrockengineeringdesignmethodologies,particularlyinthecontextofwater-bearingrocks.Theexperimentalresultsprovideadeeperunderstandingofthedamageevolutionprocessofrocksundervariousstressconditionsandprovideinsightsintotheeffectofwatercontent.
Keywords:acousticemission,water-bearingrocks,damageevolution,signalparameters,stressconditions
Introduction
Thebehaviorofrocksunderchangingstressconditionshasbeenatopicofinterestingeotechnicalengineeringformanyyears.Themechanicalpropertiesofrocksarecrucialfordesigningsafeandefficientengineeringstructuressuchastunnels,mines,andbridges.Thepresenceofwaterorotherfluidsinrockmassessignificantlyaffectsthemechanicalpropertiesofrocksandcancausedamageandfailure.Thedynamicdamageevolutionprocessofrocksunderchangingstressconditionsiscomplex,andvariousmethodshavebeenproposedtounderstandthisprocess.
Acousticem