Abstract: Aiming at the problem of difficult maintenance and strong dynamic pressure roadway in extra thick coal seam, taking the 19110 auxiliary transportation roadway in Pingshuo No.1 Coal Mine as the research background, using the methods of numerical simulation, theoretical analysis and field measurement, the evolution law of mining stress and deformation and failure characteristics of roadway surrounding rock are studied, and the optimization design and field test of support scheme are carried out. The results show that the significant influence of the mining support pressure on the roadway mainly occurs behind the goaf that lags behind the adjacent mining face. According to the elastic-plastic mechanical analysis of unequal pressure tunnels, it is known that the lateral pressure coefficient has a significant impact on the deformation and failure of the surrounding rock of the tunnel. The deformation amount and plastic zone radius of the tunnel increase with the increase of the lateral pressure coefficient. The lateral pressure coefficient determined based on numerical simulation and theoretical calculation is less than 2, and the radius of the plastic zone in the tunnel is designed to be 1.90 meters. The optimized design plan for tunnel support is: MSGM-335 Φ 22 mm×2 400 mm left handed threaded steel without longitudinal reinforcement anchor rods is used, with a row & line space of 900 mm×1 000 mm between top anchor rods, 6 pieces arranged in each row, with the outermost one 350 mm away from the side, and steel strip reinforcement support installed. The row & line space of 1 200 mm×1 000 mm between sidewall anchor rods, with 3 pieces arranged on the left and right sides, and 1 piece on the top 300 mm away from the top. Anchor cable used Φ21.8 mm nineteen core steel strands, with a length ranging from 10 300 mm to 13 300 mm depending on the thickness of the top coal. Two strands are arranged in each row with a row & line space of 2 000 mm×3 000 mm. The deformation monitoring results of the field test roadway show that the optimized support scheme has a good effect on the deformation control of the surrounding rock of the roadway.