巖石單軸壓縮破裂過程中聲發(fā)射信號特征初探.pdf

1、武漢理工大學碩士學位論文巖石單軸壓縮破裂過程中聲發(fā)射信號特征初探姓名：李墨瀟申請學位級別：碩士專業(yè)：采礦工程指導教師：章光201104AbstractRockburstisakindofdynamicallyinstableandgeologicaldisasterwhichthreatensthesafetyofpeopleandequipmentItisalwaysacosmopolitismtoughproblemandthere

2、isneitherasetofmaturetheoryinuseofpredictionitnorsystematicandcomprehensiveunderstandingitsreasonsbecauseofcomplicatedproblemsexistingintherockburstanddifferenttheoriesofgradingAsaccompanyingphenomenatheAEPhenomenonofroc

3、kduringtherockdamageprocesspointsoutmanyinformationoftheprocessofrockfailure，andpavesanewwayforforecastingcrackinitiationandextensionSoitisimportanttostudytheAEphenomenaformonitoringrock、rockfailureandpredictingearthquak

4、eTheanalysisandstudyofAEsignalofrockCaninferitsinternalchangeandinversionthemechanismofrockfailureSowecanstudythedamagemechanismofrockwhichhasrockburstpronenessduringtheloadbyusingacousticemissiontechnique，anditishelpful

5、tounderstandtherockburstpronenessthroughanalyzingtheAEcharacteristicsdunngtheprocessofloadingObjectivetoexploretheAEcharacteristicsofdifferentkindsofrockduringuniaxialcompressionandtheAEcharacteristicsofrockswhichhavedif

6、ferentrockburstproneness，weselecteachrepresentativerocksamplesofvolcanicrock、metamorphicrockandsedimentaryrockstoactinteriorrockmechanicstestAtthesametimeofuniaxialcompressionwecollecttheAEsignalduringthewholeprocessthen

7、analyzetheAEcharacteristicsofdifferentkindsofrockandcalculationtherockimpactenergyindexofrockswhichcanrepresenttheirrockburstpronenessInquiringtherelationshipbetweenrockburstpronenessandtheirAEcharacteristics，thencombine

8、thisrelationshipwiththeexistingjudgmentmethodstoestablishmoreobjectiveandeffectivewaytoevaluatetherockburstpronenessThechiefconclusionofthedissertationisinthefollowing：(1)Dynamicfailuredurationunderuniaxialcompressionare

9、calculated，threerockbursttendentiousnessareanalyzed，obtainstherockburstpronenessofgraniteisstrongerthanothertworocks，therockburstpronenessofsandstoneistheweakest(2)Duringtheprocessofloadtofailure，theAEcountsandcountstope