Dingji and Pansi Minefields are connected. From nine exploration lines in the east to fifteen exploration lines in the west; North from F1 fault, south to 13-1 coal seam -900m floor contour vertical projection line on the ground. The east-west strike length of the whole mine field is about 9.3km, the north-south inclination width is about 5.8km, and the area is about 54.28km2.