大倾角松软厚煤层巷道优化设计及数值分析

    Numerical analysis and optimization design of large angle soft thick coal seam roadway

    • 摘要: 以大远煤业有限公司杜家村煤矿2号开采煤层1201回采平巷的工程条件为背景,分析了大倾角松软厚煤层在不同断面形状和支护方式下稳定性问题。采用工程类比法及FLAC3D数值分析软件,对三种方案在不同的巷道断面、支护方式下,巷道围岩的位移变形情况、应力分布情况等进行了模拟分析比较,研究结果表明,在同样采用锚网索+钢带的联合支护形式下,直墙圆拱形巷道形状的垂直和水平变形量比其他两个方案分别低78%和23%,且应力分布较均匀,更加适合大倾角松软煤层巷道的开挖支护。论文研究结果可为工程设计和实际应用提供依据。

       

      Abstract: Against the background of 1201 return airway of Dujiacun coal seam mining 2# Coal, the large dip angle Soft coal seam roadway that in different section shape and supporting mode stability problem is analyzed. By using the Engineering analogy method, and FLAC3D numerical simulation software, the three cross-section shape and supporting scheme is simulated. The results show that,under the joint form of mesh-anchor + steel supporting, the vertical wall round arched roadway vertical and horizontal deformation smaller than the other two programs were 78% and 23%. the stress distribution more uniform and more suitable for excavation and support in the large inclination soft coal seam roadway, and provides a theoretical basis for practical application.

       

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