Abstract: The No.13 coal seam of Hulusu coal mine in Inner Mongolia Autonomous Region is deeply buried and the coal seam is in a high-stress environment.The section preparation roadway adopts the method of double lane tunneling.In view of the serious deformation of the surrounding rock of the auxiliary transportation roadway and the difficulty of secondary utilization, through the establishment of mechanical models of coal pillars in different stages and combining with the geological conditions of Hulusu coal mine, the width of coal pillars between roadways is analyzed and it is finally determined that the width should not be less than 35.57 m.Combined with the acquired physical and mechanical parameters of the overlying rock, FLAC^3D software is used for numerical simulation and analysis, and the stress change relationship and the displacement change relationship of the surrounding rock side and the surrounding rock interior of the auxiliary transportation entry under the influence of the excavation stage is obtained, it is concluded that in the process of double-lane excavation in Hulusu coal mine, the deformation of roadway is mainly the displacement of two sides, and the two sides of the roadway have slight asymmetric damage.In the vertical direction:the stress in the roadway floor σ_y < the stress in the roadway roof σ_y < the stress on the right side of the roadway σ_y < the stress in the coal pillar σ_y.In the horizontal direction:the maximum horizontal compressive stress in the coal pillar σ_x < the maximum horizontal compressive stress σ_x in the coal body on the right side of the roadway.It is proposed that the section shape of deep high-stress roadway is straight wall semicircle arch.Adopt the combined support method of the roof support with curved steel belt + high pretension anchor rods and anchor cables with anchor nets + the inverse bottom arch filling and matching concrete.The field monitoring shows that the maximum roof subsidence is 90.0 mm, the maximum floor heave is 55.0 mm, and the maximum internal displacement of both sides is 138.0 mm, indicating that the overall supporting of surrounding rock of the tunnel is significantly improved, the deformation of the surrounding rock is effectively controlled, the whole structure of the roadway is protected and the self-bearing capacity of the surrounding rock can be better exerted by adopting the support method.