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煤柱回采期间瓦斯涌出量为该块煤层正常回采期间瓦斯涌出量的一半,通过仰角钻孔进行采后瓦斯放,再配以专用瓦斯尾排巷或采空区抽放完全可以解决采面及转角瓦斯。
During the period of coal pillar mining, the amount of gas emission is half of the gas emission during the normal coal mining of this coal seam. The post-mining gas discharge through elevation drilling, together with the special gas tailrace or gob drainage can completely solve the problem of mining Surface and corner gas.