In this paper, the FLAC3D Extrusion module was used to simulate the design of the 72909 fully mechanized mining face of the Du’erping Mine. The variation of the plastic zone of the surrounding rock, the stress condition of the surrounding rock, and the distance between the roof and the floor were numerically simulated. The fish language established the roadway mining model and compared the advantages and disadvantages of the two overback-back mining methods. Finally, it was found that for inclined coal seams to be back-inclined, the use of bottom-retaining roof or slow-curve method for recovery mining could effectively relieve the occurrence of mine pressure and ensure the safe production of mines. In addition to this, ancillary measures for work surface crossing the anticline was proposed. The upper coal wall was solidified with chemical materials, the middle part under control and the top was retained, and the lower coal wall was under secondary support, which improved the face of the coal wall. The phenomenon of roof caving and rib spalling was effectively controlled.