Control for the large section roadway under small abandoned mines in the same coal seam by secondary support,Energy Science & Engineering

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Control for the large section roadway under small abandoned mines in the same coal seam by secondary support
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-06-10 , DOI: 10.1002/ese3.758
Yang Tai ₁ , Hongchun Xia ₂ , Hongjie Liu ₃ , Zhanyuan Ma ₃ , Yanqun Zhang ₃

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To control roadway under small abandoned mines in ultrathick coal seam, this paper analyzed its deformation and failure characteristics. As a result, the roadway occurred roof leakage and right rib extrusion. Based on above characteristics, the secondary support schemes were put forward. To predict the control effects of the roadway, a numerical model was built to analyze its deformation under the secondary support schemes. Besides, the industrial test was carried out. From the test and numerical simulation, a significant increase could be found in vertical stress and bearing capacity on ribs after the secondary support. Moreover, under the secondary support, the roof separations of roadway decreased more than 90%, while the lateral displacements of the roadway dropped over 85%. Based on the above, it was indicated that the deformation of the roadway could be well controlled.

中文翻译：

二次支护控制同一煤层废弃小煤矿下的大断面巷道

为了控制超厚煤层废弃小煤矿下的巷道，分析了巷道的变形和破坏特征。结果，巷道发生了屋顶泄漏和右肋挤压。基于以上特点，提出了二次支持方案。为了预测巷道的控制效果，建立了一个数值模型来分析其在二次支护方案下的变形。此外，还进行了工业测试。通过测试和数值模拟，可以发现辅助支撑后的肋骨的垂直应力和承载力有显着增加。此外，在二次支撑下，巷道顶板间距减少了90％以上，而巷道的横向位移下降了85％以上。根据以上所述，

更新日期：2020-06-10

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