小峪煤矿采空区瓦斯抽放工艺实践与体会

通过对上层采空区的瓦斯进行抽放,达到了降低瓦斯总量的目的,消除了下层回采工作面在开采过程中上隅角瓦斯浓度超限的问题。

The top of the mined - out area for gas drainage, to reduce gas emission in the end, the elimination oflowercoal face in the process of mining the upper comer gas concentration limits.