恒源煤矿II638工作面区域治理注浆效果分析

Analysis of the Grouting Effect on Regional Government of Hengyuan Coal Mine’s II638 Working Face

摘要: 本文基于资料分析、工程实践、物探探查、钻探验证等方法，对恒源煤矿II638工作面区域治理注浆效果进行分析。结果表明：1) 底板太灰水因其富水强、水头高，是II638工作面6煤开采的主要水害威胁；2) II638工作面区域治理注浆改造层位为三灰，由Z7和Z8两个注浆单元、17个分支孔覆盖，累计注水泥27,730 t，平均顺层率90%以上；3) 井下钻孔验证表明，工作面风巷单孔最大出水1 m³/h (一灰)，三灰无出水，机巷单孔最大出水量5 m³/h (三灰)；4) 瞬变电磁超前探查机巷底板60 m范围内岩层赋水性较弱，网络并行电法探查发现工作面底板5处异常区均受II637工作面机巷底板岩层破坏影响，异常区井下钻探验证仅1个孔在二灰出水0.2 m³/h，其余均未出现灰岩层涌水现象，表明II638工作面区域治理注浆改造效果良好。

Abstract: Based on data analysis, engineering practice, geophysical exploration, and drilling verification, the grouting effect of regional treatment in the II638 working face of Hengyuan Coal Mine was analyzed in this paper. The analysis results show that: 1) The Taihui water in the floor is the primary water hazard threat to the mining of Coal Seam 6 in the II638 working face due to its high water content and elevated water head. 2) The grouting treatment for regional control in the II638 working face targets the Sanhui layer, covering two grouting units (Z7 and Z8) and 17 branch boreholes, with a cumulative cement injection of 27,730 tons and an average bedding plane filling rate exceeding 90%. 3) Underground drilling verification shows the maximum water output of 1 m³/h (from the Yihui layer) in the airway borehole, while the Sanhui layer remains dry. The maximum water output in the machine roadway borehole reaches 5 m³/h (from the Sanhui layer). 4) Transient electromagnetic advanced exploration reveals weak water-bearing properties within 60 meters of the floor in the machine roadway, while network parallel electrical method exploration identifies five abnormal zones in the working face floor, all affected by floor rock layer damage from the II637 working face machine roadway. Underground drilling verification confirms that only one borehole (in the Erhui layer) exhibits water output of 0.2 m³/h, with no limestone layer water inflow observed in the other boreholes, indicating effective grouting treatment in the II638 working face regional control.