Abstract: Abstract: According to the mining pressure characteristics of the close seam group in Donghuantuo Mine of Kailuan Mining Area, the plastic zone and pressure relief ratio distribution law of the surrounding rock of the underlying roadway under the two conditions of excavation before mining and excavation after excavation are studied by theoretical analysis and numerical simulation, and the pressure relief driving scheme of the underlying-690 horizontal return air roadway in the No.3 working face of Donghuantuo Mine is obtained, which solves the problem that excavation after excavation leads to large excavation. The problems of serious deformation and destruction of roadway and heavy overhaul workload provide a basis for roadway support design under combined mining of close-range coal seams.