动静载叠加扰动对巷道围岩的冲击破坏

The Rock Burst Damage of Surrounding Rock under the Disturbance of Static and Dynamic Load

针对某矿1306工作面下顺槽冲击地压事故,以SOS微震监测系统监测定位到的大能量震源为依托,通过FLAC^(2D)数值模拟软件根据具体地质条件建立模型,分析研究了静载荷动静载叠加作用下巷道顶底板应力和位移的演化规律。变换震源位置来模拟研究不同动静载叠加强度下巷道围岩力学响应特征,结果表明:随着震源的远离,对巷道顶底板影响效果急剧衰减,对两帮影响效果成比例下降。研究旨在对受动静载叠加扰动作用巷道围岩稳定性改善提供一定的控制理论和现场指导意义。

According to the lower trough rock burst accident of the 1306 working face of a mine,based on the large energy source monitored by SOS micro-seismic monitoring system,the analysis model under the acutal geological conditions is established by adopting FLAC2 Dsoftware,so as to study the involution regularities of the stress and displacement of roadway roof and floor under the superimposed action of static and dynamic load. The mechanical response characteristics of the roadway surrounding rock under the different superimposed strength of static and dynamic load is simulated and analyzed by transforming the source location. The study results show that： with the with the source location is far way from the monitoring locations,which influence of the roadway roof and floor is decreased rapidly,and the influence of two sides of roadway are also reduced proportionally. The above study results in this paper can provide some theoretical basis and field guiding significance for the study of slope stability under the superimposed influence of static and dynamic load.