中文摘要：

为研究列车动载荷对采空区稳定性的影响.概化运行列车和采空区顶板力学模型,分析采空区顶板在以一定速度运动的常力作用下的运动方程,用移动的恒定载荷模拟理想情况下运行列车对采空区顶板及地表的作用过程,进行动力有限元分析.结果表明:与不受外部载荷影响条件下相比,在列车动载荷作用下,地表最大竖向位移和煤柱所承受的最大压应力都有大幅增加,并随着列车的前行最大值逐渐增大,且相应向前移动,列车运行到采空区中部达到最大,然后随着列车的前行最大值开始逐渐减小.

英文摘要：

In order to study that dynamic loading of train impacts on stability of goaf,this study generalizated the mechanic model of moving train and goaf roof,analyzed the equation of motion about goaf affected by regular force moving at certain speed,simulated the process of train running on goaf with moving constant loading,and analyzed the dynamic finite element.The result of study indicates that the maximum vertical displacement of surface and the maximum compressive stress of coal pillars are increased significantly,compared with without external action.The maximum values are increased gradually with train running,and it runs up to the maximum when train runs to the middle of goaf,then the maximum values are decreased gradually with train running.