摘要
运用岩石破裂过程分析RFPA2D系统,研究了断层上含非均匀性障碍体对地震序列类型的影响。通过对断层障碍体不同均质度系数m=1.1、m=1.5、m=6.0这3个样本进行破裂过程的模拟,发现均质度不同会产生不同地震序列类型,这些序列类型主要是前震主震余震型、主震型和震群型。此外,对3种不同均质度的障碍体的岩石样本破裂过程的模拟表明,岩石介质的非均匀性不但对岩样宏观强度和宏观变形非线性行为有显著的影响,而且对试样破裂模式也有显著的影响。
Analyzing RFPA system with rock rupture process, the article studies the influence of fault heterogeneous asperity acting on earthquake sequence type. By simulating rupture process of different homogenization coefficients of fault asperity, m= 1.1, m = 1.5,and m= 6. 0, the result shows that different kinds of homogenization form different earthquake sequence types, which are mainly foreshock-mainshock-aftershock type, mainshock type and earthquake swarm type. In addition, simulating rupture process of rock sample of three kinds of different homogenization asperity shows that rock homogenization has remarkable effect on not only macro-strength and nonlinear action of macro-deformation of rock sample, but also rupture patter.
出处
《内陆地震》
2006年第1期25-32,共8页
Inland Earthquake
关键词
非均匀性
破裂过程
地震序列
Hcterogeneity
Rupture process
Earthquake Sequence
