贵州某煤矿瓦斯预抽效果分析

贵州省某煤矿开采薄及中厚近距离煤层群,该煤矿煤层瓦斯含量高,所属贵州省纳雍县是煤与瓦斯突出片区。矿井首采M2煤层工作面瓦斯涌出量大,瓦斯涌出来源广,工作面回采前主要采用的瓦斯治理措施有布置底板穿层钻孔和本煤层顺层钻孔预抽煤层瓦斯,掘进工作面主要采取边掘边抽的瓦斯抽采措施,确保达到消突效果。

Pre-extraction Effect Analysis of Coal Mine in Guizhou

A coal mine mines close thin and medium thick coal seams,the coal seam gas content is high,where belongs to Nayong County of Guizhou Province,is a coal and gas outburst area.M2 seam has a large quantity of gas emissionaty,and gas emission sources the first mined is broad,before face mining gas control mainly uses floor drilling and the coal draining seam to pump gas and the excavation work surface mainly takes excavation while drilling gas to ensure the effect of eliminating gas outburst.