Abstract: The 9^# coal is mined at 4916 working face of a coal mine. Due to the 24.5 m thick igneous rock lying above the coal seam, the gangue filling process is applied to avoid the percussive dynamic pressure triggered by the coal excavation. In addition, the mining stress filed after filling is studied by the method of numerical simulation and field measurement for obtaining the filling results. The results indicate that the abutment pressure field in front of the coal wall is not distributed symmetrically along the middle of the working face affected by the adjacent working face. To be specific, the peak value of abutment pressure and its scope of the upper termination occupy the first place; the middle part comes second and those of the lower termination are minimal. The peak point is quite closed to the coal wall with the distance being only 6 m and the value researches 1.5 MPa. In other words, the working face is still in danger of percussive dynamic pressure. Therefore, forced caving is applied in practical mining process to achieve the safety at 4916 working face.