动载扰动下深部巷道群的力学响应数值分析

Numerical Analysis of Mechanical Response of Deep Roadway Group Under Dynamic Disturbance

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 effects on the surrounding rock stability of deep roadway group under dynamic load disturbance,using RFPA numerical analysis methods,under the action of the different disturbance intensity of simulated research on the dynamic response of roadway surrounding rock.The group of surrounding rock stress distribution and damage of surrounding rock of roadway under the static and dynamic loading is obtained by analyzing.The results show that： the stability of surrounding rock and initial stress state and disturbance intensity are closely related,increasing of stress wave amplitude,damage range of surrounding rock of roadway to increase; limit control disturbance source distance and the strengthening of roadway surrounding rock of help can reduce the disturbance caused by the instability and failure of roadway surrounding rock.