厚煤层自动成巷定向单裂技术切顶效果评价

IF 6.9 1区 工程技术 Q2 ENERGY & FUELS International Journal of Coal Science & Technology Pub Date : 2023-11-18 DOI:10.1007/s40789-023-00642-0
Yubing Gao, Qiukai Gai, Xingxing Zhang, Xun Xi, Manchao He
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引用次数: 0

摘要

切顶自动造巷是一种可持续的无矿柱采矿方法,具有提高采煤回收率、减少巷道开挖、提高开采安全性的潜力。在该方法中,顶板切割是消除应力的关键工序,对巷道的稳定性有重要影响。本文提出了一种考虑岩石性质的定向单裂(DSC)顶板切割技术。通过显式有限元分析探讨了DSC技术的作用机理。通过离散元模拟和现场试验,对DSC技术和顶板切割参数进行了评价。在此基础上,对优化后的DSC技术进行了现场试验。结果表明,DSC技术可以有效控制顶板围岩的爆破应力分布和裂纹扩展,从而实现巷道顶板定向单裂纹。采用优化参数的DSC切顶技术可以有效地减小巷道变形,提高巷道的稳定性。现场工程应用验证了所评价的DSC切顶技术的可行性和有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Evaluation of roof cutting by directionally single cracking technique in automatic roadway formation for thick coal seam mining

Automatic roadway formation by roof cutting is a sustainable nonpillar mining method that has the potential to increase coal recovery, reduce roadway excavation and improve mining safety. In this method, roof cutting is the key process for stress relief, which significantly affects the stability of the formed roadway. This paper presents a directionally single cracking (DSC) technique for roof cutting with considerations of rock properties. The mechanism of the DSC technique was investigated by explicit finite element analyses. The DSC technique and roof cutting parameters were evaluated by discrete element simulation and field experiment. On this basis, the optimized DSC technique was tested in the field. The results indicate that the DSC technique could effectively control the blast-induced stress distribution and crack propagation in the roof rock, thus, achieve directionally single cracking on the roadway roof. The DSC technique for roof cutting with optimized parameters could effectively reduce the deformation and improve the stability of the formed roadway. Field engineering application verified the feasibility and effectiveness of the evaluated DSC technique for roof cutting.

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来源期刊
CiteScore
11.40
自引率
8.40%
发文量
678
审稿时长
12 weeks
期刊介绍: The International Journal of Coal Science & Technology is a peer-reviewed open access journal that focuses on key topics of coal scientific research and mining development. It serves as a forum for scientists to present research findings and discuss challenging issues in the field. The journal covers a range of topics including coal geology, geochemistry, geophysics, mineralogy, and petrology. It also covers coal mining theory, technology, and engineering, as well as coal processing, utilization, and conversion. Additionally, the journal explores coal mining environment and reclamation, along with related aspects. The International Journal of Coal Science & Technology is published with China Coal Society, who also cover the publication costs. This means that authors do not need to pay an article-processing charge.
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