矿震诱发冲击地压机理研究

Study on mechanism of rock burst induced by mine quake

根据弹性波理论推导出矿震产生的应力波诱发动力扰动的公式,建立冲击地压理论模型从而推导出冲击地压发生的发生理论;并利用ABAQUS数值模拟技术模拟了矿震诱发冲击地压的过程;并探究围岩巷道受到静—动荷载叠加作用时,冲击地压的发生条件;根据现实中某矿矿震引发的冲击地压测得的数据,验证了矿震诱发冲击地压这一理论。模拟结果表明,当围岩巷道受到的地应力静载过大,达到临界塑性区时,微小的矿震会引发围岩巷道出现冲击地压现象。

According to the elastic wave theory,the formula of stress wave induced dynamic disturbance generated by the mine quake was deduced,and the theoretical model of rock burst was established so as to deduce the occurrence theory of rock burst;the process of rock burst induced by mine shock was simulated by using abaqus numerical simulation technology;the occurrence conditions of rock burst were investigated when the surrouding rock roadway was subjected to the action of static-dynamic load superposition.According to the measured data of the rock burst induced by a mine quake in reality,the theory of rock burst induced by mine quake was verified.The simulation results showed that when the the static stress on the surrounding rock roadway was too high and reaches the critical plastic zone,small mine quake can cause the occurrence of rock burst in the surrounding rock roadway.