That is to say,to increase discharged-pressure hole and gas releasing hole,improve coalfield ventilation to release pressure by getting into deep and natural drilling.

• 本文介绍了采用煤体注水法均匀释放瓦斯,增加卸压孔和瓦斯释放孔,穿层钻孔抽放,顺层钻孔抽放,增加煤体透气性,使煤体卸压,达到瓦斯释放效果。