Abstract: In order to estimate surface deformation caused by coal mining,the method in this paper based on probalibility integral method to calculate the surface deformation paramters and estimate surface deformation of ming area in high accuracy is proposed by using the least squares inversion method.So,the controur surface deformation and 3D simulating diagram are obtained.The research results show that,the surface deformation can be estimated effectively by using the parameters of surface deformation at the basis of the least squares method.In addition,this research result can provide a theoretical basis for the further study on mining subsidence. 　　

Key words: Probability integration method, Principle of least square, Deformation parameter, Mining subsidence