单成方,尚会杨,张强,李亚锋,刘伟,黄鹏

• 1:库车县榆树岭煤矿有限责任公司
• 2:中国矿业大学矿业工程学院

摘要(Abstract)：

具有“双硬”特征煤层的工作面其护巷煤柱的极限尺寸确定与常规工作面有所不同。以榆树岭煤矿505工作面沿空掘进巷道为背景,首先测试了煤岩样的力学性质和不同高径比煤样的抗压强度,得到了不同高径比煤样峰值强度曲线;其次分析了沿空掘巷覆岩结构模型,建立了沿空掘巷护巷煤柱顶板力学模型,得到了不同宽度煤柱所受的载荷应力;建立了不同高宽比煤柱的数值模型,得到了不同高宽比煤柱的极限强度校核公式;最后通过对比不同宽度煤柱所受的载荷应力和极限强度,得出4m宽度的煤柱即可满足支护要求,并在此基础上提出了沿空掘进巷道支护工艺。现场监测结果表明,煤柱宽度为4m时,巷道整体变形量较小,巷道稳定性得到有效维护。研究结果可为小煤柱护巷宽度的确定提供参考。

关键词(KeyWords)： “双硬”煤层;沿空掘巷;区段煤柱;支承应力;巷道稳定

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 单成方,尚会杨,张强,李亚锋,刘伟,黄鹏

DOI: 10.13532/j.jmsce.cn10-1638/td.2024.02.008

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