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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。
The failure process of single-hole rock under the influence of pore water pressure is numerically simulated by RFPA ~ (2 D), a coupled system of seepage and stress analysis in rock failure process. The results show that the pore water pressure will reduce the rock strength, with the pore water pressure increases, the crack propagation speed increases and quickly entered the instability expansion phase, when a large acoustic emission sudden jump, this Kickstalk pressure is called the critical pressure of instability in the process of rock burst. Monitoring the critical pressure by acoustic emission may have some guiding significance for engineering practice.