矿井复杂地质构造区域瓦斯综合治理技术实践研究

Practice and Research on Comprehensive Gas Control Technology in Complex Geological Structure of Mine

针对晋华宫煤矿8101综采工作面在回采过程中煤层极具变化、瓦斯赋存不稳定的情况,提出以本煤层钻孔抽放、高位裂隙钻孔抽放、低位钻孔抽放相结合的瓦斯综合治理技术,钻孔区域预抽后,工作面平均风排瓦斯量为5.24m3/min,平均抽采瓦斯总量为8.64m3/min,回风巷的瓦斯浓度控制在0.08%~0.32%之间,平均瓦斯浓度为0.19%,工作面游离瓦斯得到了有效的控制。

In view of the extremely changeable coal seam and unstable gas occurrence in 8101 fully mechanized mining face of Jinhuagong Coal Mine in the process of mining, a comprehensive gas control technology combining borehole drainage in this coal seam, borehole drainage in high position and borehole drainage in low position is put forward. After pre-drainage in the borehole area, the average gas drainage in the working face is 5.24 m3/min. The average total amount of gas extracted is 8.64 m3/min. The gas concentration in return air roadway is controlled between 0.08% and 0.32%, and the average gas concentration is 0.19%. The free gas in working face is effectively controlled.