深井复合顶板沿空掘巷极窄煤柱段掘进支护技术研究

Research on Tunneling and Supporting Technology of Extreme Narrow Coal Pillar of Gob-side Driving in Deep Mine with Composite Roof

针对深部高应力条件下复合型顶板煤巷支护难度大的问题,在沿空巷道支护技术分析的基础上,基于巷道原有支护方案,提出了过巷帮硐室极窄煤柱的支护技术。通过丁集煤矿1331(3)轨顺掘进工作面成功实践,结果表明采用高强度锚网索配合工字钢护帮及平顶棚托顶的联合支护方式,可较为显著提高极窄煤柱段沿空巷道围岩的稳定性,能够满足工作面回采时期的需要。

In view of the difficulty of supporting the composite roof coal roadway under the condition of deep high stress, based on the analysis of the supporting technology of the roadway along the gob, based on the original support scheme of the roadway, the supporting technology for the extreme narrow coal pillar of the roadway passing chamber is put forward. By 1331 （3） Dingji coal mine along the rail practice heading face successfully, the results show that the high strength bolt mesh cable with steel guard and fiat shed supporting the top combined supporting method, can stability is extremely narrow coal pillar along the roadway, to meet the needs of mining period.