瓦斯排放巷在屯留矿厚煤层综放工作面的应用

Application of Gas Drainage Roadway in Thick Coal Seam Fully Mechanized Working Face of Tunliu Mine

针对屯留矿厚煤层综放工作面瓦斯涌出量高及分布范围广的特点,运用数值模拟方法,研究厚煤层宏观裂隙发育范围,提出了双巷掘进后用相邻工作面运巷做为本工作面瓦斯排放巷,并在其中布置高位钻孔和采空区抽采筛管的综合方法,对开采过程中煤层释放至采空区的瓦斯进行抽采。研究表明:高位钻孔应延深至工作面采空区中央上方28 m,抽采方案现场实施后,高位钻孔抽采瓦斯浓度平均达20.18%,筛管抽采平均19.1%,有效控制了采空区瓦斯向工作面的涌进量和上隅角瓦斯浓度。

Based on large gas emission and broad gas distribution of thick coal seam fully mechanized working face of Tunliu Mine, numerical simulation was adopted to study thick coal seam fracture development scope, the double roadway after mining, the working face transportation roadway was used as the gas drainage roadway of the working face, the high drilling was set and goaf drainage and screen comprehensive method was adopted, the gas released to goaf in mining was drained.The study showed that high drilling should extend to the central working face goaf upper 28 m, after the drainage, the average gas drainage by high drilling achieved by 20.18%, average screen drainage by 19.1%, which effectively controlled goaf gas emission to working face and the upper corner gas concentration.