深井煤层群首采下保护层工作面瓦斯治理技术  

GasControl Technique for Firstly Mining Working Face of Under Protective Layer in Deep-well with Coal Seams Group

作　　者：孙宏敏[1] 卢平[1] 陈洋洋[1] 

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230022

出　　处：《安徽建筑大学学报》2015年第2期49-53,共5页Journal of Anhui Jianzhu University

摘　　要：本文以千米深井——朱集煤矿1242(1)首采工作面的瓦斯治理为例,提出并实施了地面钻井、高抽巷和采空区埋管相结合的瓦斯分源治理综合技术,分别抽采上覆13-1煤层卸压瓦斯、顶板瓦斯富集区瓦斯和上隅角瓦斯。实践表明,1242(1)工作面平均绝对瓦斯涌出量为68.8m3/min,地面钻井平均瓦斯抽采量为28.7m3/min,占瓦斯涌出量的42.2%,高抽巷平均瓦斯抽采量为30.7m3/min,占瓦斯涌出量的45.2%,瓦斯抽采率高达87.4%,回风流瓦斯浓度低于0.4%,实现深井高瓦斯煤层群首采下保护层工作面的安全高效开采。研究成果对类似条件矿井首采层工作面的瓦斯治理有指导价值。Taking firstly mining 1242（1） working face of deep-well coal seams group in Zhuji Coal Mine for example, the comprehensive gas management with sub-source technology with the combination of surface well, high level drainage roadway and goal gas pipe is proposed and implemented, pressure relief gas, roof and gas-rich region on the corner gas methane of overlying 13-1 coal seam extracted respectively. The Practice showed that, the average gas extraction of surface well and gas drainage of high level drainage roadway are 28. 7m3/min and 30. 7m3/min, which are accounting for 42.2% and 45.2% of the average absolute gas emission of 68. 8m3/min, the gas drainage efficiency reaches up to 87.4% and the gas concentration of air return below 0. 4%, and the production is realized with safety and efficiency. The research achievements have the guidance value for the gas control on similar firstly mining layer working faces.

关 键 词：下保护层 卸压瓦斯 高抽巷 地面钻井 

分 类 号：TD712[矿业工程—矿井通风与安全]