Stabilization Technology of Large Deformation and Broken Roadway Under High Stress

Based on mining roadway support problem of 3B^# coal seam of Chengshan Coal Mine in Longmay Group, in view of the problems such as the large deformation, the loose and broken deep roadway, based on the field coal and rock characteristics test, mechanical experiment and so on, with the help of numerical simulation, we research roadway control measures. The results show that the loose circle range of 3B^# coal seam is 0.6 m to 1.2 m, which belongs to the medium loose circle, the coal body is more broken in the loose circle, and the surrounding rock destruction is mainly in the vertical direction. By comparing the roadway surrounding rock displacement, stress and deformation under the support schemes, it is suggested that the roadway deformation can be controlled by increasing the support of the roadway and the anchorage of the coal pillar. And, on-site observation proves that the program can effectively control the roadway roof and floor, two-side deformation, and the roadway section shrinkage rate is 23.5%, which ensures the normal use of roadway.