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时间:2019-03-06
《动测法确定岩体动力参数的对比试验研究》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、第23卷第2期岩石力学与工程学报23(2):277~2832004年1月ChineseJournalofRockMechanicsandEngineeringJan.,2004*相对定位方法在非完整岩体声发射定位中的应用1212121胡新亮马胜利高景春刘力强刁桂苓宋富喜刘胜国12(河北省地震局石家庄050021)(中国地震局地质研究所构造物理开放实验室北京100029)摘要声发射技术是研究岩石变形破坏微观机理的重要手段,对研究岩石失稳的机制和前兆具有重要意义,而其定位技术是诸多研究的基础。应用对速度结构依赖较少的相对定位方法,对非完整、非同性介质岩石试验中的声发射事件进行了定位研究。定位结果
2、表明,相对定位方法可用于复杂样品声发射事件的定位,其可靠性及精度比以往有所提高,在震相到时自动识别的基础上,可用于大批量声发射事件的连续定位。关键词岩石力学,相对定位,非完整岩体,声发射,定位方法+分类号TU459.3,O462.2文献标识码A文章编号1000-6915(2004)02-0277-07LOCATIONOFACOUSTICEMISSIONSINNON-INTEGRALROCKUSINGRELATIVELOCATINGMETHOD1212121HuXinliang,MaShengli,GaoJingchun,LiuLiqiang,DiaoGuiling,SongFuxi,LiuS
3、hengguo1(SeismologicalBureauofHebeiProvince,Shijiazhuang050021China)2(LaboratoryofTectonophysics,InstituteofGeology,ChinaSeismologicalBureau,Beijing100029China)AbstractThetechniqueofacousticemissionisanimportantapproachtorevealthemicro-mechanismofdeformationandfailureofrocks,whichissignificantinstu
4、dyonmechanismandprecursorofinstabilityofrocks,andthelocationofacousticemissioneventsisthebasisforitsanalysis.Innon-integralandnon-homogeneousrocks,thewavevelocityfieldanditschangewithtimearerathercomplex,anditisdifficulttolocateaccuratelyacousticemissioneventsusingtraditionalandabsolutelocatingmeth
5、od.Therefore,therelativelocatingmethodisintroducedintothelocationofacousticemission,whichislessdependentonthewavevelocityfield.Therelativelocatingmethodisbroadlyusedinlocatingofearthquakesnow,anditismoreeffectiveinlocatingearthquakeswithclusteringcharacteristicssuchasswarmsandaftershocks.Aacoustice
6、missionsduringdeformationofrocksareofsimilarcharacteristics.Thebasicprincipleoftherelativelocatingmethodistoselectaneventfromtherecordingdatawithhighqualityasthemasterearthquakeandtolocateaccuratelyitspositionusingtraditionalmethod,thentolocatepositionsofothereventsrelativetothemastereventbasedonth
7、eirdifferencesinarrivingtimerelativetothemasterevent,andfurthertolocatetherealpositionsofallevents.Byusingtherelativelocatingmethod,theacousticemissioneventsarelocatedduringthedeformationofsomenon-integrala
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