深井破碎围岩巷道协同支护技术研究与应用

为解决煤炭资源进入深部开采时破碎围岩巷道支护所面临的变形大、易失稳、难支护等问题，提出“架棚+锚杆(索)+注浆”协同支护方案，运用钻孔窥视确定巷道围岩结构稳定性、裂隙发育特征，FLAC3D数值模拟对比分析常规锚网喷支护、锚注支护及棚锚注协同支护塑性区分布，结果表明：棚锚注协同支护技术较另两种方案表现出更好的支护效果，塑性区分布范围明显减少，应力集中现象得以缓解，支护巷道模拟变形量与工程监测较为接近。工程试验表明：采用常规锚网喷支护、锚注支护巷道仍存在较大变形，不能保持长期稳定，棚锚注协同支护巷道变形明显降低，应用期间顶板下沉量较常规锚网喷支护降低了68%，两帮位移降低了52%，满足巷道支护稳定要求。棚锚注协同支护技术对深部破碎围岩巷道变形控制效果显著，尤其在掘进影响期控制围岩作用表现突出。

Research and Application of Collaborative Support Technology for Broken Surrounding Rock in Deep Wells

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.