岩石破裂滑动过程及其声发射数值模拟

NUMERICAL SIMULATION ON ROCK SLIP FAILURE AND ITS ASSOCIATED ACOUSTIC EMISSIONS

运用岩石破裂与失稳过程分析RFPA2D系统 ,对滑动形成过程进行了数值模拟研究。滑动岩体似为非均匀弹 -脆岩石材料 ,模拟结果再现了滑动形成从变形到破坏直至失稳的全过程及其声发射规律。结果表明 ,剪断面是滑动形成的主要形式 ,并首先在试样一端出现 ,然后再形成由一端及里的剪断面扩展直至另一端最后产生剪断面破坏贯通 。

By using a Rock Failure Process Analysis code (RFPA 2D ),slip failure process and associated seismicity in rock masses are numerically studied.The slipping rock mass seems to be of brittle and heterogeneous materials.The simulation result reproduced the whole process from deformation to failure leading to instability inducing seismicity in slipping rock masses and associated acoustic emissions.It shows that shear plane is the main feature of the slip failure mode.The shear plane as it initiated on the one termination of the crack,extends to the center and then to another termination.Finally,a macro scopic shear fault plane is observed.