Numerical Research of the Influence of the Heterogeneity of Rock on Rock Failure and Its Induced Seismic Sequences
Seismicity pattern is one of the most promising subjects in earthquake prediction studies because it generates information about physical conditions such as the degree of heterogeneity or the state of stress in and around the source region of an impending large earthquake. For this purpose, a series of numerical model tests were performed to investigate the effects of the heterogeneity of rocks on the rock failure and induced seismic patterns under biaxial loading using the Rock Failure Process Analysis code (RFPA2D). The failure procedures of rock sample with 5 different kinds of heterogeneity are simulated. It suggested that rock failure with the different heterogeneity produces different seismic sequence types, mainly including (1) main shock-aftershock type, (2) foreshock-main shock-aftershock type, and (3) swarm type. The simulation results provide a better understanding to the precursory occurrence mechanism. Besides, the numerical simulation of rock failure with the different heterogeneity shows that the non-linear behaviour of rock deformation and failure mode are obviously affected by the heterogeneity.
Numerical simulation seismicity pattern heterogeneity rock failure
Mingruo Jiao Xiaodong Jia Xiaoyan Guo
Liaoning Seismological Bureau Shenyang,110031,P.R.China
国际会议
大连
英文
438-442
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）