相对定位方法在非完整岩体声发射定位中的应用
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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。
The technique of acoustic emission is an important approach to reveal the micro-mechanism of deformation and failure of rocks,which is significant in study on mechanism and precursor of instability of rocks,and the location of acoustic emission events is the basis for its analysis. In non-integral and non-homogeneous rocks,the wave velocity field and its change with time are rather complex,and it is difficult to locate accurately acoustic emission events using traditional and absolute locating method. Therefore,the relative locating method is introduced into the location of acoustic emission,which is less dependent on the wave velocity field. The relative locating method is broadly used in locating of earthquakes now,and it is more effective in locating earthquakes with clustering characteristics such as swarms and aftershocks. Aacoustic emissions during deformation of rocks are of similar characteristics. The basic principle of the relative locating method is to select an event from the recording data with high quality as the master earthquake and to locate accurately its position using traditional method,then to locate positions of other events relative to the master event based on their differences in arriving time relative to the master event,and further to locate the real positions of all events. By using the relative locating method,the acoustic emission events are located during the deformation of some non-integral and non-homogeneous rock samples. The results show that the relative locating method can be used to locate acoustic emission events in complex samples,and its reliability and accuracy are obviously improved compared with the traditional method.
引文
1LocknerD.The role of acoustic emission in the study of rock fracture[J].Int.J.RockMech. andMin.Sci.&Geomech.Abstr.,1993,30(7):883~900
    2MogiK.Sour celocati on ofelast icshoc ks int hefracturi ngproce ss inrock(1)[J].Bull.Earthq.Res.Inst.TokyoUniver.,1968,46(4):1103~1125
    3Sch olzCH.Experime ntals tu dyo fthefractu ringpro ce ssinbri ttlerock[J].J.Geophys.Res.,1968,73(4):1447~1454
    4By erleeJD,Lo cknerDA.Ac ousticem ission durin gfluidinj ecti onintorock[A].In: HardyHR,Lei g htonFWed.Proce edingsofFirstConf erenceonAcousticEmission/MicroseismicAc tivityinGeologicalStru cturesandMaterials[C].Clausthal:Trans.Tech.Publications,1977
    5KusunoseK,NishizawaO, Ona iK . AEga pinar ockunder uniaxialcompression[J].J.SeismolSoc.Jpn.,Ser.2,1982,35(1):91~102
    6刘力强,马瑾,吴秀泉.雁列式断层变形与失稳过程的实验研究[J].地震学报,1986,8(4):393~348
    7雷兴林,马瑾.岩石声发射三维定位及波速场联合反演[A].见:马瑾,王绳祖编.全国第二届构造物理学术讨论会文集[C].北京:地震出版社,1990,186~195
    8许昭永,梅世蓉,庄灿涛.真三轴压缩时几种岩样微破裂定位的初步结果[J].地震学报,1992,14(增):702~709
    9蒋海昆,张流,王錡.实验室声发射三维定位及标本波速场各向异性研究[J].地震,1999,19(3):245~252
    10许迎年,徐文胜,王元汉等.岩爆模拟试验及岩爆机理研究[J].岩石力学与工程学报,2002,21(10):1462~1466
    11纪洪广,蔡美峰.混凝土材料声发射与应力-应变参量耦合关系及应用[J].岩石力学与工程学报,2003,22(2):227~231
    12周小平,张永兴.大厂铜坑矿细脉带岩石结构面直剪实验中声发射特性研究[J].岩石力学与工程学报,2002,21(5):724~727
    13马秀芳.用相对定位法测定1973年安徽霍山震群的震源位置[J].地震研究,1982,5(1):99~1 18
    14PoupinetG,Ells worthWL, FrchetJ.Mo ni tor ingve locit yvariation sinthecrust usingearthq ua kedoublets:a napplicationtotheCalaverasfault,California[J].J.Geophys.Res.,1984,89(B7):5719~5731
    15吴开统,焦远碧,吕培苓等.地震序列概论[M].北 京:北京大学出版??1990
    16G otJL, FrchetJ, KleinFW. Deep faultplan egeometr yinferredf rommult ipl etrel ative relocationbeneaththesouthflankofKilauea[J].J.Geophys.Res.,1994,99(B8):15375~15386
    17高景春,胡斌,张从珍.用相对定位法精细测定张北地震序列的时空参数[J].华北地震科学,1999,17(1):42~46
    18周仕勇,许忠淮,韩京等.主地震定位法分析以及1997年新疆伽师强震群高精度定位[J].地震学报,1 999,21(3):258~265
    19AkiK,Ric hardsPG.QuantitativeSeismolo g y.Theoy andMethods[M].SanFrancisco:WHFreemanandCompany,1980
    20张少泉.近震分析[M].北京:地震出版社,1977

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