马军峪矿9+10号煤沿空掘巷关键参数研究

Study on key parameters of gob-side entry driving in No.9+10 coal seam of Majunyu Mine

针对马军峪煤矿9+10号煤回采期间存在巷道围岩变形的问题,马军峪煤矿拟采用小煤柱沿空掘巷,通过理论分析和数值模拟的方法,确定沿空掘巷切顶合理参数及最优煤柱宽度为5 m,现场应用结果表明,留设5 m小煤柱后掘巷,实体煤帮变化量及顶板下沉量、切顶较非切顶侧均降低,效果良好。该研究为类似条件下的小煤柱沿空掘巷技术提供借鉴。

Aiming at the problem of roadway surrounding rock deformation during the mining of No.9 + 10 coal seam in Majunyu Mine,small coal pillar gob-side entry driving was adopted.Through theoretical analysis and numerical simulation,the reasonable parameters of roof cutting in gob-side entry driving and the optimal coal pillar width were determined to be 5m.The field application results showed that after leaving 5 m small coal pillar,the variation of solid coal side and roof subsidence were reduced,and the roof cutting was lower than that of non-roof cutting side,and the effect was good.This study provided a reference for the technology of small coal pillar gob-side entry driving under similar conditions.