论文部分内容阅读
以汾西矿业集团曙光煤矿1214高瓦斯工作面为背景,分析了工作面瓦斯分布及运移规律,以瓦斯分源抽采为原则,提出了“本煤层预抽、低位采空区埋管、中位钻孔截流、高位钻孔抽采”的立体化协同抽采方案,结合1214工作面实际,确定了本煤层预抽钻孔、顶板走向裂隙带钻孔的布置参数,并在现场进行工业试验,工作面瓦斯抽采率达70%~75%,表明抽采效果良好。
Taking the 1214 high gas face of Shuguang Coal Mine of Fenxi Mining Group as the background, the gas distribution and migration rules of the working face were analyzed. Based on the principle of gas source extraction, the principle of “pre-pumping coal seam, , The middle hole drilling cutoff and the high hole drilling extraction ”, and combined with the actual work of 1214 working face, the layout parameters of pre-pumping borehole and roof to the fracture zone borehole were determined, and on site For industrial tests, the gas drainage rate in the working face reaches 70% ~ 75%, indicating that the pumping effect is good.