煤矿冲击地压一直是困扰中国煤矿安全的主要问题,而煤矿开采过程中跳采形成的孤岛工作面由于容易产生应力集中,来压强度提高,极容易发生冲击地压。基于唐山矿T2193下孤岛工作面的地质条件,从数值分析的角度研究了煤岩体材料的非均匀性,揭示了孤岛工作面顶板周期来压时煤岩体能量释放的动态特征,分析了工作面前方能量释放激增机制。数值模拟结果显示,长壁工作面回采过程中直接顶的不断垮落造成了老顶悬空距离的不断增大,工作面周期来压时,积聚于老顶岩层内的弹性应变能将瞬间释放,容易引发工作面及巷道的冲击失稳。孤岛工作面由于其特有的矿压显现特征,老顶周期破断时所释放的弹性应变能将更加剧烈,冲击地压势必愈加强烈。孤岛工作面顶底板和煤层的能量释放激增可以作为判断煤岩体冲击失稳的前兆信息。孤岛工作面前方发生冲击破坏的主要原因是由于工作面回采过程中围岩所积聚的大量弹性能在顶板断裂时所伴随的巨大能量释放而造成的。 Coal mine rock burst has always plagued the main problems of coal mine safety in China, and the coal mining process in the jump mining formed island work surface prone to stress concentration, to increase the pressure intensity, very vulnerable to the impact of pressure. Based on the geological conditions of the detached island face under T2193 in Tangshan Mine, the heterogeneity of the coal and rock mass materials was studied from the point of view of numerical analysis. The dynamic characteristics of energy release of coal and rock mass during the period of island roof slab pressing were revealed. Energy surge in front of release mechanism. The numerical simulation results show that the continuous collapse of the direct roof during the longwall mining face causes the distance of the old roof dangling to increase continuously. When the period of the working face is pressed, the elastic strain energy accumulated in the old roof strata will be instantaneously released, Easily lead to the impact of face and roadway instability. Due to its unique characteristics of mine pressure, the island’s working face will release more elastic strain energy when the period of the old roof is broken, and the impact pressure will become stronger and stronger. The energy release surge in the top floor and coal seam of island face can be used as a precursor to determine the impact instability of coal and rock mass. The main reason for the impact damage in front of the island working face is that the large amount of elastic energy accumulated by the surrounding rock during the working face mining can be caused by the huge energy release accompanying the roof breaking.