岩体节理到脆性断层的形成过程

The Process of Formation from Joints Rock Mass to Brittle Faults

根据室内的断裂力学实验结果 ,对含结构面 (节理、裂隙 )的岩体 ,分别分析了其含一组节理、雁行节理、共轭节理等 3种情况在受力作用下的变形破坏发展过程 .结果表明 :外力作用下的岩体 ,其所含的结构面将最终沿接近主应力轴的方向扩展、延伸、破坏 .最后结合广东某些地区的地震断层实际资料的分析 ,认为地壳浅层内某些大规模的脆性断层的形成与上述含结构面的岩体扩展、破坏过程基本吻合 .

Based on the rock mass which included joints and fractures and the data obtained from laboratory tests of fracture mechanics, the deformations and failures of rock mass are analyzed under different conditions: one group of joints, plumose joints and conjugated joints The results show that rock discontinuities with the aspects of external load will extend, expand and fail in the direction of principal stress axial.According to the analyses of the information of some earthquakes in Guangdong Province,it could be reasoned that the large brittle faults in lower crust is basically in consistent with the procedures of the deformations and failures of rocks discontinuities