Study on Calculation Methods for Surface Subsidence Caused by Water Loss of Clay

In order to accurately calculate the mining induced subsidence in thick alluvium areas so as to decrease the mining damage and environment disruption,the calculation of surface subsidence caused by water loss of clay was discussed based on probability integral method and used in a real case.The results show that the water loss of clay has a great impact on surface subsidence.So this problem should not be overlooked.