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煤层透气性低,煤质松软,抽采难度大,抽采率低是目前五阳煤矿瓦斯抽采存在的主要问题,根据煤与瓦斯的耦合作用机理及煤层瓦斯的运移规律,深入分析五阳煤矿现有瓦斯抽采系统,利用RFPA2D-Flow建立本煤层瓦斯预抽钻孔数值模型,对比分析回采巷道先抽后采过程中平行钻孔预抽时间、钻孔间距和抽采负压对瓦斯抽采效果的影响,最终确定其合理的抽采参数,提高瓦斯抽采率。
Coal seam gas permeability is low, soft coal, pumping difficult, low extraction rate is the main gas extraction Wuyang coal existing problems, according to the coupling mechanism of coal and gas and coal seam gas migration rules, in-depth analysis of five The existing gas drainage system of Yang Coal Mine is established. The gas pre-drainage borehole numerical model of this coal seam is established by RFPA2D-Flow. The pre-drainage time, drilling spacing and extraction negative pressure Gas extraction effect of the impact of the final determination of its reasonable extraction parameters to improve gas extraction rate.