大倾角煤层回采巷道的矿山压力研究

    Research on Underground Pressure of Mining Roadway in Large Dip Seam

    • 摘要: 针对石台矿Ⅲ313工作面回采巷道在工作面回采过程中围岩变形破坏的具体情况,采用数值计算、现场实测等研究手段,研究了大倾角工作面回采巷道围岩在工作面超前支承压力的作用下变形破坏的规律性和复杂性。结果表明,倾角增大不仅使回采巷道内围岩应力分布表现出与倾斜、缓倾斜煤层不同的特征,而且上下平巷矿压显现也不尽相同,其主要表现为运输平巷的集中应力大于回风平巷,给出了运输平巷和回风平巷超前支护的范围和巷道支护的关键位置。

       

      Abstract: Aiming at the situations of deformation and failure in the roadway surrounding rocks during the mining process of Ⅲ313 working face in Shitai Mine, based on the results of the numerical simulation and filed data, this paper studied the regularity and complexity of the deformation and failure of mining roadway surrounding rocks under advanced abutment pressure. The results show that characteristics of stress distribution of mining roadway surrounding rocks are different from inclined and gently inclined coal seams; and pressure behavior are not the same in upper and lower drifts; the pressure in haulage drift is higher than tail roadway. The study provided the distance of advance support and the key position for roadway support.

       

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