摘要
针对魏家地煤矿东102工作面低透气性特厚煤层放顶煤开采造成工作面瓦斯超限现象,采用顶板巷、高位钻孔和地面钻井对采空区及煤层瓦斯进行立体式抽采,实践结果表明:上隅角瓦斯浓度保持在0.15%以下,回风瓦斯浓度在0.3%以下,瓦斯抽采率达到60%以上,成功解决了低透气性特厚煤层工作面瓦斯超限的问题。
Aiming at the gas overrunning phenomenon resulted from the caving mining in super-thick seam with low permeability in East 102 working face of Weijiadi Mine,the gas stereo-extraction is conducted in goaf and coal seam through roof lane,high-level borehole and surface drilling.The tests show that the gas concentration keeps at 0.15% in upper corner,below 0.3% in return air and gas drainage rate reaches more than 60%,which have successfully resolved the problem of gas overrunning in the working face of super-thick coal seam with low permeability.
出处
《中国煤炭》
北大核心
2012年第10期87-89,109,共4页
China Coal
关键词
特厚煤层
瓦斯抽采
顶板巷
高位钻孔
地面钻井
super-thick seam
gas drainage
roof roadway
high-level borehole
surface drilling
