Hybrid moment tensor inversion and numerical analysis of rock fracture

Throughindoorrockacousticemissiontest,thestudyofthespatio-temporalevolutioncharacteristicsofacousticemissionsignalsunderdifferentfractureconditionshascertainguidingsignificance formonitoringandearlywarningofrockengineering.Throughthetensileandsheartestsofrock,the temporalandspatialevolutioncharacteristicsofdifferenttypesofrockfracturewereanalyzedbyusing theGeigerlocationmethodandthehybridmomenttensortheory,andthenumericalsimulationsoftware RFPA2Dwasusedtoverifyit.Duringthetensilefailureofrock,thecrackinginitiatedatthemaximum bendingmomentandthetensioningsignalsourceisthemainsource.Duringtheshearfailure,therocks crackfirstlyinthemiddleofthemaincrackandappearthescatteredsourceoftensionsignal,butwith theincreaseoftheload,thesourceismajorlyshearsignal.