单孔岩石在孔隙水压力作用下破坏过程的数值模拟

Numerical Simulation of Rock Damage Process with Single Hole Rock under Pore Water Pressure

应用岩石破裂过程渗流-应力耦合分析系统RFPA^(2 D),对单孔岩石在孔隙水压力作用下的破坏过程进行数值模拟研究。研究结果表明,孔隙水压力会降低岩石的强度,随着孔隙水压力的增大,裂纹扩展速度加大并很快进入失稳扩展阶段,此时声发射发生一次较大的突跳,将这个突跳压力称为岩石破裂过程中的失稳临界压力,通过声发射来监测临界压力可以对工程实践有一定的指导意义。

Study on numerical simulation of the experiment on rock with single hole under pore water pressure in the failure process of rock is presented by using couped between seepage and stress of rock failure process analysis system,RFPA^(2 D). The research results show that pore water pressure can reduce the strength of the rock, and with the increase of pore water pressure, the crack propagation speed increase and quickly enter the extension stage, to the instability of the acoustic emission occurred a major kick, the kick pressure is called the critical buckling pressure of rock failure process, through the acoustic emission monitoring of critical pressure can have certain guiding significance for engineering practice.