大斗沟煤矿无煤柱切顶留巷支护技术研究

Study on support technology of non-pillar roof-cutting retaining roadway in Dadougou Coal Mine

无煤柱切顶卸压沿空留巷技术能够减少巷道掘进量,提高煤炭资源采出率,但由于重复采动的影响,其巷道围岩控制影响因素复杂。以大斗沟煤矿8306工作面2306巷为研究背景,对无煤柱切顶留巷理论进行整理分析,设计无煤柱切顶沿空留巷支护方案,并进行数值模拟分析。实践表明,该支护方案合理有效,对实现无煤柱切顶安全、高效开采具有重要意义。

The technology of gob-side entry retaining without coal pillar roof cutting and pressure relief can reduce the amount of roadway excavation and improve the recovery rate of coal resources. However, due to the influence of repeated mining, the influencing factors of roadway surrounding rock control are complex. Taking 2306 roadway of No.8306 Face in Dadougou coal mine as the research background, the theory of gob-side entry retaining without coal pillar is analyzed, and the support scheme of gob-side entry retaining without coal pillar is designed and analyzed by numerical simulation.Practice shows that the support scheme is reasonable and effective, which is of great significance to realize safe and efficient mining without coal pillar.