Stress Evolution Mechanism and Control Technology for Reversing Mining and Excavation under Mining-Induced Dynamic Pressure in Deep Mine

In order to alleviate the relationship between mining and roadway, 3204 working face 3206 roadway in Shanxi Taitou coal mine are taken as an example, width of support parameters while reversing excavation under dynamic pressure optimized. The research includes field investigations, theoretical analysis, numerical simulation, tests. Based on characteristics roof fracture distribution pillar stresses that determine is 18.7 m wide, control scheme was developed; stress deformation failure summarized. By means FLAC3D simulation software, influence widths different positions stability surrounding rock discussed. asymmetric structure trapezoidal proposed core support, dense bolts anchor cables proposed. return airway composed bolt, cable, mesh, combined with M-shaped steel belt beam. Through current situation optimized make meet production requirements, which provides a new breakthrough for deep mines China.