Abstract: According to the coal seam occurrence conditions and roof and floor conditions in 22303 working face of Bulianta Coal Mine, the working face mining calculation model is established. After two kinds of simulation model for large mining height working face is mined, the development process of the overlying rock destruction is realized by using the software RFPA.The research shows that large mining height surrounding rock of fully mechanized working face is located in low stress zone under the protection of macroscopic stress, stress shell is the main supporting body, which bears and transfers overlying rock mass load and pressure.Through the contrast of two models, with the increase of mining height, its stress peak value is smaller, but peak role of the range is bigger.