基于离散元的动载冲击地压巷道围岩稳定性分析

本文以陈家沟煤矿8514工作面为工程背景，针对目前动载作用下的巷道变形失稳等问题，借助离散元程序UDEC揭示动载作用下巷道围岩的响应特征，分析了不同距离动载对巷道稳定性的影响。数值模拟结果表明:底板变形破坏范围会因动载与巷道顶部距离减小而增加，两者呈正相关关系，但动载与巷道顶部距离对两帮和顶部变形破坏范围影响较小；动载作用下，巷道震动速度类似于正弦波的形式逐渐衰减并且存在峰值。文章研究结果旨在为动载作用下冲击地压巷道围岩稳定性分析提供相应的理论支撑。

Stability analysis of surrounding rock of roadway under dynamic load rockburst based on discrete element method

Based on the engineering background of 8514 working face in Chenjiagou coal mine, aiming at the problems of roadway deformation and instability under dynamic load, this paper revealed the response characteristics of roadway surrounding rock under dynamic load with the help of discrete element method program UDEC, and analyzed the influence of different distance dynamic load on roadway stability. The results showed that the deformation and failure range of floor would increase with the decrease of the distance between the dynamic load and the top of the roadway, and there was a positive correlation between them, but the dynamic load and the distance between the top of the roadway had little influence on the deformation and failure range of the two sides and the top; under the action of dynamic load, the vibration velocity of roadway was similar to the form of sine wave, which gradually attenuated and had a peak value. The research results of this paper aimed to provide the corresponding theoretical support for the stability analysis of surrounding rock of rockburst roadway under dynamic load.