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随着我国浅部煤炭资源的逐渐枯竭,煤矿开采深度逐渐加大,巷道底鼓现象愈趋严重。论文针对滑移型底鼓问题,利用塑性力学理论,对巷道底板滑移岩体进行了分区,推导得出了滑移型底鼓底板岩层临界破坏深度及底板最小支护荷载公式。以锚杆作用机理为依据,分析了滑移区域内微小单元体的受力特征,提出了滑移型底鼓阻滑控制措施,将成果应用于实践,为现场提供了参考。
With the gradual depletion of shallow coal resources in our country, the depth of coal mining gradually increases and the phenomenon of road bottom drum becomes more and more serious. In this paper, according to the slip-type bottom drum problem, the plasticity theory is used to partition the slip-rock mass in the floor of the roadway, and the critical failure depth and the minimum supporting load formula of the bottom floor of the slip-type bottom drum are deduced. Based on the mechanism of bolt action, the force characteristics of the micro-unit body in the slip area are analyzed, and the slip-type slip resistance control measures of the bottom drum are proposed. The results are applied in practice and provide a reference for the site.