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首页> 外文期刊>Advances in civil engineering >Simulation Study of the Roof Fracture Pattern of a Horizontal Sublevel Caving in a Steeply Inclined Thick Coal Seam
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Simulation Study of the Roof Fracture Pattern of a Horizontal Sublevel Caving in a Steeply Inclined Thick Coal Seam

机译：陡峭倾斜厚煤层中水平悬浮岩屋顶骨折图案的仿真研究

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摘要

Application of a horizontal section top-coal caving in a steeply inclined thick coal seam not only effectively resolves the problem of the large dip angle of the coal seam and slipping and dumping of mining equipment but also significantly reduces the tunnel drivage ratio and improves the extraction yield. In addition, it allows for a safe and efficient mining from a steeply inclined thick coal seam. In this paper, the roof fracture pattern of a steeply inclined thick coal seam has been studied by a similar simulation experiment. The results of the simulation are consistent with those of the numerical calculations, thus verifying the accuracy of the simulation. The experimental simulation results show that the roof can form a step-like toppling failure pattern after drawing the coal, and it is difficult to release a triangular coal mass near the floor, which is the main concentration area of coal loss. The numerical simulation results show that, with the excavation of the coal seam, the rock mass around the goaf produces plastic failure, and the damage is mainly concentrated in the roof area. The upper part of the goaf mainly shows a tensile failure, while the other areas mainly show yield failure.
机译：在陡峭倾斜的厚煤层中的水平段顶部煤脉冲的应用不仅有效地解决了煤层的大倾角和挖掘和倾销的问题，而且显着降低了隧道驱动比率并提高了提取屈服。此外，它还可以从陡峭倾斜的厚煤层中进行安全有效的开采。本文采用了类似的仿真实验，研究了陡峭倾斜厚煤层的屋顶骨折图案。模拟结果与数值计算的结果一致，从而验证模拟的准确性。实验模拟结果表明，屋顶可以在拉动煤后形成阶梯状倒装故障图案，并且难以在地板附近释放三角煤质量，这是煤炭损失的主要浓度面积。数值仿真结果表明，随着煤层的挖掘，岩石围绕岩石产生塑料失效，损坏主要集中在屋顶区域。 GOAF的上部主要显示拉伸失效，而另一个区域主要显示产量失效。

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