岩石断裂混合矩张量反演与数值分析  

Hybrid moment tensor inversion and numerical analysis of rock fracture

作　　者：张凌凡 陈忠辉[1] 秦凡 年庚乾 陈红杰 Zhang Lingfan;Chen Zhonghui;Qin Fan;Nian Gengqian;Chen Hongjie(School of Mechanics and Civil Engineering,China University of Mining and Technology,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院

出　　处：《矿业科学学报》2019年第5期394-402,共9页Journal of Mining Science and Technology

基　　金：国家重点研发计划(2016YFC0801602,2017YFC1503103)

摘　　要：通过室内岩石声发射试验研究在不同断裂情况下声发射信号的时空演化特征,对岩石工程的监测预警具有一定的指导意义。通过岩石的张拉和剪切试验,利用Geiger定位法和混合矩张量理论分析了岩石不同断裂类型的时空演化特征,并利用数值模拟软件RFPA2D进行验证。试验结果表明:在张拉破坏时,岩石在弯矩最大处首先开裂,并以张拉信号源为主;剪切破坏时,岩石在主裂隙中部首先开裂,并出现零星的张拉信号源,但随着荷载的增加,其绝大部分的信号源为剪切信号源。Through indoor rock acoustic emission test,the study of the spatio-temporal evolution characteristics of acoustic emission signals under different fracture conditions has certain guiding significance for monitoring and early warning of rock engineering.Through the tensile and shear tests of rock,the temporal and spatial evolution characteristics of different types of rock fracture were analyzed by using the Geiger location method and the hybrid moment tensor theory,and the numerical simulation software RFPA2D was used to verify it.During the tensile failure of rock,the cracking initiated at the maximum bending moment and the tensioning signal source is the main source.During the shear failure,the rocks crack firstly in the middle of the main crack and appear the scattered source of tension signal,but with the increase of the load,the source is majorly shear signal.

关 键 词：岩石声发射 监测预警 Geiger定位法 混合矩张量反演 RFPA2D数值模拟 

分 类 号：TU452[建筑科学—岩土工程]