强动压下回采巷道高预紧力强力锚杆支护技术

为了解决强烈动压条件下回采巷道的支护难题,缓解煤矿采掘衔接紧张的局面,运用高预紧力强力锚杆一次支护原则,设计的支护方案应用于潞安漳村煤矿井下强烈动压条件巷道,并进行了矿压监测,监测数据显示,巷道两帮变形量减小了70%以上。试验表明,设计方案有效控制了巷道围岩的强烈变形,明显优于类似条件下常规高强锚杆支护效果,支护成本及维护费用大幅降低,为今后类似条件巷道支护提供了一条有效途径。

High Pre-tension Powerful Bolt Support Technology for Mining Gateway Under High Mining-induced Pressure

In order to solve the support difficult problem of the mining gateway under the strong mining-induced pressure conditions and to release the connection tension situation between the mining and excavation operation in the mine,a designed support plan with once support principle of high pre-tension powerful bolt was applied to the mining gateway under the strong mining-induced pressure conditions in Zhangcun Mine of Lu'an.A strata pressure monitoring and measurement were conducted.The monitoring and measuring...