任智敏,吕梦蛟,王神虎,王禹,张广太

• 1:山西工程职业学院采矿工程系
• 2:山西潞安矿业(集团)有限责任公司左权五里堠煤业有限公司

摘要(Abstract)：

针对大采高回采巷道易失稳的问题，从巷道断面形态与围岩稳定的关系出发，提出一种改善围岩应力分布的大断面六边形巷道。以五里堠矿3号煤层地质开采条件为工程背景，利用弹性力学复变函数理论，对比分析了4种六边形巷道周边应力分布规律。研究结果表明：高宽比0.8、帮倾角60°的六边形巷道(工况1)周边应力分布最均匀、应力集中程度最小；使围岩塑性区最小的帮倾角为60°，工况1为最优断面；集中应力随采深和侧压系数的增加而增大；振速越大，动应力集中越明显，动-静应力叠加会显著加剧巷道冲击失稳风险。基于上述分析，设计了适用于六边形巷道力学特征的金属支架，且通过强度校验证明了支架设计满足工程要求。

关键词(KeyWords)： 六边形巷道;帮倾角;应力分布;静-动荷载;支架设计

Abstract:

Keywords:

基金项目(Foundation): 山西省高校科技创新基金资助项目(2019L1013);; 山西工程职业学院重点科研资助项目(KYF-201907);; 山西省教育厅优质校建设专项科研项目(JY2019-YZ05)

作者(Author): 任智敏,吕梦蛟,王神虎,王禹,张广太

DOI: 10.13532/j.jmsce.cn10-1638/td.20231114.001

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