高沼气厚煤层π放工作面顶板巷瓦斯抽放技术

Gas Drainage under Section Technology of π Type Caving Coal Face Roof Tunnel in High Gas Concentration Coal Layer

依据高沼气厚煤层一次采全高工艺采空区瓦斯流动特点,安全合理地采用顶板巷瓦斯抽放技术,有效地处理了工作面瓦斯超限问题,取得了安全生产双效益。

According to the characteristics of the gas flow role of high - technique gob in the high gas concentration coal seam, the gas drainage under section technology is safely and reasonably applied. The transfinite problem of face gas is effectivelly controlled. The safety and production benefit is obtained.