含硬包体岩石破裂演化过程的声发射数值模拟  

The numerical modeling of acoustic emission to the processes of rock damaged and evolution with high velocity body

作　　者：叶金铎[1] 陆远忠[2] 蒋淳[3] 

机构地区：[1]天津理工大学机械工程学院,天津300191 [2]中国地震局地壳应力研究所,北京100085 [3]天津市地震局分析预报中心,天津300210

出　　处：《天津理工学院学报》2004年第4期1-5,共5页Journal of Tianjin Institute of Technology

基　　金：中国地震科学联合基金资助项目(103082)

摘　　要：从岩石的损伤模型出发,推导了受到损伤岩石的单元刚度矩阵,采用声发射数值模拟方法研究了含有硬包体岩石的破裂演化过程,研究了硬包体的形状对岩石破裂演化过程的影响,确定了主破裂即将发生的临界状态,研究了围压条件对岩石破裂演化过程的影响.论文工作对于进一步研究含有随机裂纹与硬包体同时存在的岩石破裂演化过程以及研究地震空区和条带的生成条件具有较重要的参考意义.Based on the model of rock damage ,the elastic 'matrix and stiffness matrix for elements has been derived, the processes of rock damaged and evolution with high velocity body have been studied by the method of the numerical modeling of Acoustic Emission. The influences of the shape of high velocity bodies are considered and the critical state of main rupture of rock is obtained as well as the boundary condition of pressure is discussed .The work of the paper is helpful to study the evolution processes of the rock with cracks and high velocity bodies and mechanism of earthquake precursors.

关 键 词：含硬包体岩石 破裂演化过程 声发射 数值模拟 

分 类 号：P315.72[天文地球—地震学]