中煤科工开采研究院有限公司充填开采工程技术部;
针对澄合矿区复合顶板管理难度大,巷道支护困难,严重制约矿井安全开采这一问题,以山阳煤矿5号煤层1501回风巷为工程背景,对复合顶板软岩巷道的破坏机理及支护问题展开了研究。首先通过物理力学试验,得到顶板各岩层的物理参数,然后采用现场实测和理论分析的方法,分析复合顶板的应力分布特征,从而构建山阳煤矿巷道的复合顶板力学模型,最后运用数值模拟和现场实测的方法验证支护方案的可行性。研究结果表明,矿井复合顶板上部砂质泥岩为膨胀岩,最大膨胀率为42.3%,最大膨胀应力为198.2k Pa;中粒砂岩层K4为关键岩层;提出的顶板采用全锚索支护,巷帮采用金属网+钢带+锚杆支护的支护方案,经过数值模拟和现场实测的验证,该方案可满足现场生产需求。研究成果可为类似地质条件的巷道支护提供参考。
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下载次数 | 被引频次 | 阅读次数 |
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基本信息:
DOI:10.13532/j.jmsce.cn10-1638/td.2024.02.002
中图分类号:TD353
引用信息:
[1]李宏儒,吕华文,乔军等.膨胀应力作用下复合顶板巷道围岩支护研究[J].采矿与岩层控制工程学报,2024,6(02):62-75.DOI:10.13532/j.jmsce.cn10-1638/td.2024.02.002.
基金信息:
天地科技“公司其他内部研发项目”开采设计事业部“科技创新基金”资助项目(KJ–2019–TDKCQN–05)