李雅庄煤矿“U”型通风工作面瓦斯治理技术  

Gas Control Technology of"U"Ventilation Face in Liyazhuang Coal Mine

作　　者：侯文光 HOU Wenguang(Liyazhuang Coal Mine,Huozhou Coal Electricity Group Co.,Ltd.)

机构地区：[1]霍州煤电集团有限责任公司李雅庄煤矿,山西省霍州市031400

出　　处：《现代矿业》2020年第9期199-201,207,共4页Modern Mining

摘　　要：针对高瓦斯矿井“U”型通风工作面上隅角瓦斯浓度高、管理难度大的问题,在李雅庄煤矿开展了本煤层抽采优化分析和裂隙带抽采研究。通过改进本煤层钻孔的封孔深度、联孔工艺、管路联接方式等,钻孔抽采浓度由抽采4个月后降低到9%,提高到抽采10个月后维持在19%;通过调整裂隙带钻孔布置方式、优化钻孔布孔层位、采取下筛管护孔等技术,裂隙带钻场最高瓦斯抽采纯流量达13.6 m^3/min,平均瓦斯抽采纯流量达8 m^3/min,2个钻场综合抽采瓦斯纯流量在13 m^3/min以上;工作面取消了高抽巷和高位钻场裂隙带瓦斯抽采,上隅角和回风流平均瓦斯浓度分别控制在0.5%和0.4%以下。Aiming at the problems of high gas concentration and difficult management in the upper corner of"U"ventilation face in high gas mine,Liyazhuang coal mine has carried out the optimization analysis of coal seam extraction and the research of fracture zone extraction。Through improving the sealing depth,joint hole technology,pipeline connection mode,etc,the concentration of borehole extraction decreased from 4 months to 9%,and increased to 19%after 10 months。By adjusting the layout of the holes in the fracture zone,optimizing the arrangement of the holes and adopting the technology of protecting the holes with the lower screen pipe,the maximum net flow of gas drainage in the drilling field of fracture zone is 13.6 m^3/min,the average net flow of gas drainage is 8 m^3/min,and the total net flow of gas drainage in the two drilling fields is more than 13 m^3/min。The gas drainage in the fracture zone of high drainage roadway and high level drilling field is cancelled in the working face,and the average gas concentration in the upper corner and return air flow is controlled below 0.5%and 0.4%respectively.

关 键 词：本煤层抽采 下筛管 工艺改进 窥视 轨迹控制 层位优化 

分 类 号：TD712.6[矿业工程—矿井通风与安全]