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分析了破碎围岩弱面、水蚀、构造应力、大断面等因素对余吾煤业+400 m水平轨道大巷围岩变形破坏的影响,论述了轨道大巷两帮破坏诱发顶板变形的围岩破坏特征,进一步阐述了采用注浆加固减小帮顶围岩塑性区,锚杆支护提高了围岩的自承能力的锚注联合控制技术。矿压观测结果表明,注浆加固围岩弱面后,锚杆锚索初期快速承载,围岩最大表面位移约23 mm,控制效果显著。
The influence of weak surface, water erosion, tectonic stress and large section on the deformation and failure of the surrounding rock of +400 m horizontal track in Yuwu Coal Industry is analyzed. The failure of surrounding rock caused by the damage of two tracks of the alley is discussed. Characteristics, further elaborated the use of grouting reinforcement to reduce the plastic zone around the top of the rock plastic, rock bolt support to improve the self-supporting capacity of the surrounding rock bolt joint control technology. The results of rock pressure observation show that after the grouting reinforces the weak face of the surrounding rock, the anchorage cable anchors rapidly and initially and the maximum surface displacement of the surrounding rock is about 23 mm, and the control effect is remarkable.