隆博煤业2-508回风巷窄煤柱沿空掘巷技术研究与试验

Research and Test of Technology of Driving Roadway Along Goaf with Narrow Coal Pillar in the 2-508 Return Air Roadway of Longbo Coal Industry

为改善巷道应力环境,提高煤炭资源回收率,以隆博煤业2-508回风巷生产地质条件为工程背景,综合采用数值模拟、现场试验的方法,分析了不同煤柱宽度下巷道围岩应力及顶板下沉规律,确定了合理的窄煤柱宽度。基于此,试验了2-508回风巷窄煤柱沿空掘巷,现场应用结果证明了煤柱宽度留设及窄煤柱沿空掘巷支护技术的合理性。

In order to improve the stress environment of roadway and improve the recovery rate of coal resources,taking the production geological conditions of the 2-508 return air roadway in Longbo Coal Industry as the engineering background,the methods of numerical simulation and field test are comprehensively adopted.The surrounding rock stress and roof subsidence law of roadway under different coal pillar width are analyzed,and the reasonable narrow coal pillar width is determined.Based on this,the narrow coal pillar driving along the goaf in the 2-508 return air roadway is tested,and the field application results prove the rationality of the coal pillar width setting and the supporting technology of narrow coal pillar driving along the goaf.