Abstract: Combining with actual conditions of Lijiahao Coal Mine, in order to achieve the design capacity of mine production, simultaneous mining was carried out in 2-2 and 3-1 close distance seam group. In order to reduce the mutual superposition influence of two mining faces from abutment pressure, the 3-1 lower coal seam was located in the decompression zone of 2-2 upper coal seam, which ensured safety production of the two coal seams. Using theoretical analysis combined with numerical simulation, rational alternate distance of mining faces is confirmed. And there is a good effect in practice.