区段煤柱下巷道修复加固技术 .pdfVIP

学兔兔 2012年第l期 煤 炭 工 程 区段煤柱下巷道修复加固技术 王元明 ，冯 伟 ，柏建彪。 (1．山西蒲县宏源煤业集团有限公司，山西临汾 001200； 2．中国矿业大学煤炭资源与安全开采国家重点实验室，江苏徐州 221008) 摘 要：北峪煤矿3—101运输平巷从上覆2 煤层区段煤柱下方的一侧斜穿到另一侧，斜穿 煤柱段距上覆煤柱垂直距离约为1．0～3．5m。2 煤层区段煤柱宽度为18m。斜穿煤柱段两帮相对 移近量达2m左右、煤体破碎，巷道变形严重。针对这种情况，在分析巷道变形破坏原因及修复 加固机理的基础上提出了修复加固技术，即采用水力膨胀锚杆支护两帮破碎煤体，顶板补打高强 螺纹钢锚杆和锚索进行加强支护。工程实践表明，该技术能够使锚固区煤帮形成整体承载结构， 使顶板形成组合梁承载结构，并与深部围岩相连，有效地控制了巷道围岩变形，取得了显著的技 术经济效益。 关键词：区段煤柱；极近距离煤层；修复加固机理；水力膨胀锚杆 中图分类号：TD353 文献标识码：B 文章编号：1671—0959(2012)O1-0037-04 Repair and Reinforcement Technology of Mine Roadway under Sectional Coal Pillar WANG Yuan—ming ，FENG Wei ，BAI Jian—biao (1．Shanxi Puxian Hongyuan Coal Mining Group Corporation Ltd．，Linfen 041200，China； 2．National Key Lab of Coal Resources and Safety Mining，China University of Mining and Technology，Xuzhou 221008，China) Abstract：No．3—101 haulage roadway in Beiyu Mine was inclined passed from one bottom side to other bottom side under the sectional coal pillars overlying No．2 seam and the vertical distance between the crossed pillar and the overlying coal pillar was about 1．0—3．5m．The width of the sectional pillar in No．seam was 18m．the convergence between the two side ribs of the inclined passed coal pillar section was about 2m，the coal mass was broken and the deformation of the gateway was serious．According to the conditions，base on the analysis on the deformation failure causes of the gateway and the repair and reinforcement mechanism，the repair and reinforcement technology of the gateway was provided．The hydraulic swelling bolt support was applied to the broken coal mass