近距离煤层群条件下采空区动态拖管瓦斯抽采技术  

Dynamic Dragging Pipe Gas Extraction Technology for Goaf in Closed Distance Coal Seam Group

作　　者：黄炳 李荣欣 周松元 郭少军 HUANG Bing;LI Rongxin;ZHOU Songyuan;GUO Shaojun(Safety Research Center,Hunan Vocational Institute of Safety Technology/Changsha Coal Safety Technology Training Center,Changsha 410151,China;Mechanics Department,Shenmu Vocational Education Center,Shenmu 719300,China)

机构地区：[1]湖南安全技术职业学院/长沙煤矿安全技术培训中心安全科研中心,湖南长沙410151 [2]神木职业技术教育中心机械系,陕西神木719300

出　　处：《煤矿安全》2018年第10期66-68,共3页Safety in Coal Mines

摘　　要：通过对资江煤矿3338工作面回风隅角瓦斯超限问题进行分析,推断出邻近层瓦斯通过沟通裂隙涌向开采工作面是导致超限的主要原因,针对性地提出了采空区动态拖管抽采技术。在风巷往采空区内布置1条长12 m的大口径抽放管,保持抽放管管口停留在采空区7~9 m位置,并在抽放外接上引出1条抽放支管专门抽排回风隅角瓦斯,这种抽采方式既截流了采空区高浓度瓦斯,又有效地抽排回风隅角涡流瓦斯。This paper analyzes the problem of gas over-limit in the return air corner of 3338 working face of Zijiang Coal Mine, it is inferred that the main reason for the over-limit is the gas flowing to the mining face in the adjacent layer by communicating the cracks. In this paper, the dynamic dragging pipe extraction technology in goaf is proposed. A 12 m long large-diameter drainage pipe is arranged in the wind lane to the goaf, and the outlet pipe port is kept at the position of 7 m to 9 m in the goaf, in addition, a drainage branch pipe is drawn out to discharge the gas at return air corner. This method not only intercepts the high concentration gas in the goaf, but also effectively exhausts the eddy gas in the return air corner.

关 键 词：近距离煤层群 采空区 瓦斯抽采 动态拖管 回风隅角 

分 类 号：TD712[矿业工程—矿井通风与安全]