铁山南煤矿坚硬大倾角巷道切顶留巷参数优化
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1.湖南科技大学资源环境与安全工程学院;2.湖南科技大学煤矿安全开采技术湖南省重点实验室;3.四川省铁山南煤矿

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国家自然科学基金面上项目(52174110);湖南省科技人才托举工程项目(2022TJ-NO6);湖南省教育厅科学研究重点项目(21A0313)


Optimization of the parameters of the hard and large inclination roadway of Tieshannan Coal Mine
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1.School of Resources Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan,;2.China;3.Key Laboratory of Disaster Prevention and Control of Coal Mine gas and roof plate in Southern China;4.Hunan,China;5.The Tieshannan Coal Mine in Si Chuan;6.School of Resources Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan

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    摘要:

    针对铁山南煤矿-1212(21)综采工作面煤层倾角较大,顶板较为坚硬,原有的切顶方案没有起到良好的卸压效果,围岩变形量较大。做好巷道围岩控制是提高煤矿安全、高效生产的关键。铁山南煤矿原有切顶卸压沿空留巷方案并没有起到良好的效果。本文对切顶留巷方案进行优化,通过理论计算得出最小破断角为8°,最少切顶深度为10m;运用数值模拟软件模拟8°、12°、16°以及不同切缝深度10m、15m、20m下围岩应力及顶板垂直位移情况,并通过现场爆破试验,得出最优切顶参数:破断角为12°,切缝深度为15m,聚能拉伸爆破参数为深度1500mm,间距500mm,装药量为4+0+4+0+3+0+1。最后应用于现场,通过监测-1212巷道一次采动阶段、留巷稳定阶段、二次采动阶段三个阶段下巷道顶板下沉量的变化,验证了优化方案的可行性,为大倾角坚硬煤层沿空留巷提供思路。

    Abstract:

    In view of the large inclination angle of the coal seam and the hard roof of the fully mechanised mining face of Tieshannan Coal Mine-1212 (21), the original roof cutting scheme did not have a good pressure relief effect, and the deformation of the surrounding rock was large. Doing a good job in the control of roadway surrounding rock is the key to improving the safety and efficient production of coal mines. The original roof cutting and pressure relief scheme of Tieshannan Coal Mine and leaving the roadway along the empty road did not have a good effect. In this paper, the roof cutting and roadway retention scheme is optimised, and the minimum breaking angle is 8° and the minimum roof cutting depth is 10m. Numerical simulation software was used to simulate the stress of surrounding rock and the vertical displacement of the roof under 8°, 12°, 16° and different cutting depths of 10m, 15m and 20m, and the optimal roof cutting parameters were obtained through the field blasting test: the breaking angle was 12°, the cutting depth was 15m, the shaped tensile blasting parameters were 1500mm, the spacing was 500mm, and the charge was 4+0+4+0+3+0+1. Finally, it was applied to the site, and the feasibility of the optimisation scheme was verified by monitoring the changes of the roof subsidence of the roadway in the three stages of the primary mining stage, the roadway stabilisation stage and the secondary mining stage of the -1212 roadway, and provided ideas for the roadway retention along the empty roadway of the hard coal seam with large inclination angle.

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  • 收稿日期:2024-11-04
  • 最后修改日期:2025-06-13
  • 录用日期:2025-06-26
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