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为研究动载扰动对深部巷道群围岩稳定性的影响,利用RFPA数值分析方法,对不同扰动强度作用下的巷道围岩动态响应规律进行了模拟研究。通过分析得到静-动加载下巷道群围岩应力分布规律和围岩的损伤破坏情况。结果表明:围岩的稳定性与初始地应力状态和扰动强度密切相关,应力波幅值的增大,巷道围岩的破坏范围加大;限制巷道到扰动源的距离及加强巷道帮部围岩的控制可减小扰动引起巷道群围岩的破坏失稳。
In order to study the influence of dynamic disturbance on the surrounding rock stability of deep alleyway, the dynamic response law of surrounding rock under different disturbance intensity was simulated by RFPA numerical analysis method. Through the analysis, the stress distribution law of the surrounding rock mass and the damage of the surrounding rock under the static-dynamic loading are obtained. The results show that the stability of surrounding rock is closely related to initial state of stress and perturbation intensity, and the amplitude of stress wave increases and the damage range of surrounding rock increases; the distance between roadway and disturbance source is limited and the surrounding rock The control can reduce the disturbances and cause the instability of the surrounding rocks of the roadway group.