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某矿20322工作面带式输送机平巷掘进期间受到断层构造影响易发生冒顶事故,通过现场调研发现断层构造区多处锚索断裂而对顶板支护失效,在此基础上通过RFPA软件模拟了不同强度和刚度条件下顶板垮冒情况。结果表明随着顶板强度和刚度增大,顶板稳定性显著增强;高预应力多锚索桁架系统与顶板协同作用能有效地提高顶板的强度和刚度,控制顶板小结构的完整和稳定性。
During the excavation of 20322 working face belt conveyor in a mine, the roof fall occurred due to the influence of fault structure during excavation. Through field investigation, it was found that the failure of roof support was caused by the breakage of multiple anchor cables in the fault zone. On this basis, RFPA software was used to simulate Roof under different strength and stiffness conditions collapse. The results show that with the increase of roof strength and stiffness, the stability of the roof is significantly enhanced. The synergy of high prestressed multi-cable truss system and roof can effectively improve the strength and rigidity of the roof and control the integrity and stability of the roof.