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针对九龙煤矿-850 m深部胶带大巷围岩破碎、支护失效等问题,通过围岩力学性能测试、围岩裂隙窥视、巷道围岩浅孔注浆结合深孔注浆锚索二次加固试验对巷道围岩破坏机理和稳定性进行了研究。结果表明,巷道所处位置水平构造应力大和巷道支护结构设计不合理是造成胶带大巷围岩破坏的主要原因。根据破坏机理和理论计算得到的浅孔注浆结合深孔注浆锚索二次加固支护方案能有效解决由水平构造应力带来的巷道围岩破坏问题,巷道注浆加固后,巷道两帮和顶底移近量较加固前仅增长5 cm和3.5 cm,控制了巷道围岩整体移近量,支护效果明显。
Aiming at the problems such as the crushing and support failure of the surrounding rock of -850 m deep belt and roadway in Jiulong Coal Mine, through the mechanical test of surrounding rock, the peep of the surrounding rock, the shallow hole grouting in the surrounding rock of the tunnel and the secondary reinforcement grouting The destruction mechanism and stability of roadway surrounding rock are studied. The results show that the main reason for the damage of the surrounding rock of the tape and laneway is the large constructional stress at the location of the roadway and the unreasonable design of the supporting structure of the roadway. According to the failure mechanism and theoretical calculation, the shallow hole grouting combined with the deep hole grouting anchor cable secondary reinforcement support scheme can effectively solve the problem of surrounding rock destruction caused by the horizontal tectonic stress. After grouting and reinforcement of the roadway, And the top and bottom moved closer to the amount of reinforcement before only increased by 5 cm and 3.5 cm, controlling the overall amount of surrounding rock near the roadway, support effect is obvious.