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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.
In order to study the influence of dynamic load of train on the stability of goaf, the motion model of roof and roof of goaf is generalized, the equation of motion of roof under the constant force of moving at a certain speed is analyzed, Simulation results show that the maximum vertical displacement of the ground under the dynamic load of the train and the maximum vertical displacement of the ground under the dynamic load of the train The maximum compressive stress that the coal pillar will bear has increased greatly, and as the maximum value of the train forward increases, and moves forward accordingly, the train reaches the maximum in the middle of the goaf, and then as the train moves forward maximum The value begins to decrease gradually.