采用大孔径瓦斯钻孔提高单孔瓦斯抽放量

By Using Large-diameter Gas Drainage Borehole Improve Gas Drainage Amount of Haplopore

介绍了采用大孔径瓦斯抽放钻孔,提高单孔瓦斯抽放量的途径。杜儿坪矿自1979年建立瓦斯抽放系统以来,一直采用孔径d65 mm的瓦斯抽放钻孔抽放瓦斯,单孔瓦斯抽放量较低,不能适应瓦斯治理的需要。通过扩大瓦斯抽放钻孔,即采用d94 mm的瓦斯抽放钻孔,在其它参数和封孔工艺未做改变的情况下,增加了钻孔表面积,扩大了瓦斯抽放的空间,降低了钻孔的抽放阻力,从而达到提高单孔瓦斯抽放量的目的。

Introduces the technology of applying large - diameter gas drainage borehole to improve drainage amount of haplopore. Since Duerping mine established the gas drainage system in 1979, d65 mm gas drainage borehole have been wildly used to draw out gas. However, the drainage amount of haplopore was too low to meet the demand of gas control. Under the circumstances that none parameters and seal technology changed, by applying large - diameter gas drainage borehole, namely, d94 mm gas drainage borehole, the surface area of borehole is increased, the space of gas drainage is expanded, the resistance of borehole is lowered, and finally the target of improving gas drainage amount of haplopore is realized.