应力波扰动诱发冲击矿压数值模拟研究

采用非连续离散元软件UDEC,对应力波扰动诱发冲击矿压形成发生全过程、巷道埋深H及扰动应力强度P,max对围岩稳定性的影响进行了有效的数值模拟,得到了巷道围岩在应力波扰动过程中响应速率、响应变形及岩体破损范围大小,以及发生冲击矿压的临界深度和临界扰动应力强度值.结果表明:扰动应力波是引起围岩裂隙延伸贯通,继而诱发冲击矿压的重要因素;围岩埋深条件及扰动应力波的强度决定了巷道围岩裂隙发展影响区域及形态,并最终影响到冲击地压发生与否.研究结果对揭示煤矿冲击矿压的诱发机理具有重要意义.

Numerical Simulation of Stress Wave Induced Rock Burst

The whole process of the rockburst induced by the disturbing stress wave and the effect of the roadway depth H and the disturbing stress wave intensity Pmax on the stability of the surrounding rock is simulated by using the software UDEC.The response rate,response deformation, the damage range of surrounding rock under the disturbance together with the critical depth where rock burst takes place and the critical disturbing stress are acquired.The result shows that the stress wave disturbance is an important...