摘要
在建立石门揭煤抽放瓦斯钻孔周围煤体瓦斯渗流方程的基础上 ,利用数值计算方法模拟分析了煤层钻孔周围瓦斯渗流规律以及影响石门揭煤钻孔瓦斯抽放率的影响因素 ,提出了在一定煤层透气性条件下原始煤层钻孔抽放瓦斯的极限抽放时间、极限抽放量和最大的安全抽放钻孔间距 ,并将数值计算结果应用于指导现场施工 。
Based on the gas seepage equation of the coalmass around the draining drills during rock cross cut coal uncovering,the paper analyzed the gas seepage law of the coalmass around the drills by numerical calculation method as well as the influential elements of drainage rate in rock cross cut coal uncovering, suggested the limit drainage time and amount and the maximum safety drill spacing in the original coal seam with a given air permeability. The calculation results can direct the field construction effectively and provide practical guidance for the application of outburst prevention safety measures in rock cross cut coal uncovering under the similar situations.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2002年第3期242-248,共7页
Journal of China Coal Society
