封闭式采煤法开采高瓦斯煤层

Mining high gas coal seam with enclosed mining method

介绍了一种新的瓦斯控制方法 ,在工作面形成一个高浓度的临时封闭空间 ,瓦斯浓度稳定在爆炸限度以外 ,而上、下巷的瓦斯浓度低于 1% ,设一个与回风系统不相连的瓦斯排放通道 。

A new gas control method is introduced.It is that high dens e temporary enclosed room is formed, gas density is steady beyond explosour l im it, the gas concentration in up and down roadway is below 1%, the face gas is dr a wn out by setting up a gas tunnel not connected with mine ventilation system.