关键词: 巷道支护, 注浆锚杆, 协同支护, 破碎围岩, 深部开采

Abstract: In order to solve the problems of large deformation, easy instability and difficult support in roadway support of broken surrounding rock when coal resources enter deep mining, a coordinated support scheme of scaffolding + bolts (cables) + grouting is proposed. The characteristics of surrounding rock structure stability and crack development were determined by drilling peep. FLAC3D numerical simulation compares and analyzes the stress and plastic zone distribution of conventional bolt-shotcrete support, bolt-grouting support and shed bolt-grouting collaborative support. The results show that the shed-anchor-injection synergistic support technology shows better support effect than the other two schemes, the plastic zone distribution range is obviously reduced, the stress concentration phenomenon is alleviated, and the simulated deformation of the support roadway is close to the engineering monitoring. The engineering test shows that: the roadway with conventional bolt mesh and shotcrete support and anchor injection support still has large deformation and cannot maintain long-term stability, and the roof subsidence during the application period is reduced by 68% compared with the conventional bolt-mesh shotcrete support. , the displacement of the two groups is reduced by 52%, which meets the stability requirements of roadway support. The shed-anchor-grouting synergistic support technology has a significant effect on the deformation control of the deep broken surrounding rock roadway, especially in the control of the surrounding rock during the impact period of the excavation.