Abstract:In view of the large inclination angle of the coal seam and the hard roof of the fully mechanised mining face of Tieshannan Coal Mine-1212 (21), the original roof cutting scheme did not have a good pressure relief effect, and the deformation of the surrounding rock was large. Doing a good job in the control of roadway surrounding rock is the key to improving the safety and efficient production of coal mines. The original roof cutting and pressure relief scheme of Tieshannan Coal Mine and leaving the roadway along the empty road did not have a good effect. In this paper, the roof cutting and roadway retention scheme is optimised, and the minimum breaking angle is 8° and the minimum roof cutting depth is 10m. Numerical simulation software was used to simulate the stress of surrounding rock and the vertical displacement of the roof under 8°, 12°, 16° and different cutting depths of 10m, 15m and 20m, and the optimal roof cutting parameters were obtained through the field blasting test: the breaking angle was 12°, the cutting depth was 15m, the shaped tensile blasting parameters were 1500mm, the spacing was 500mm, and the charge was 4+0+4+0+3+0+1. Finally, it was applied to the site, and the feasibility of the optimisation scheme was verified by monitoring the changes of the roof subsidence of the roadway in the three stages of the primary mining stage, the roadway stabilisation stage and the secondary mining stage of the -1212 roadway, and provided ideas for the roadway retention along the empty roadway of the hard coal seam with large inclination angle.