The main results are:(1) The mechanical model of overburden after mining should be divided into four zones, namely, failure zone, separation zone, bending zone and loose alluvium zone;

• 认为：（1）采后覆岩结构具有分带性，结构力学模型应划分为破裂带、离层带、弯曲带和松散冲积层带；（2）岩石的本构方程可以应用内时理论和开尔文-伏尔特流变模型得到；