非均质煤层瓦斯分布特征及钻孔抽采瓦斯运移规律研究

Study on gas distribution characteristics of heterogeneous coal seam and gas migration law of boreholes drainage

为了提高煤矿瓦斯抽采率,节约瓦斯抽采时间,分析了非均质煤层瓦斯分布特征及钻孔抽采瓦斯运移规律,采用透气性系数研究了非均质煤层瓦斯压力分布特点;分析了非均质煤层单钻孔瓦斯压力分布、原始瓦斯压力、原始透气性系数对有效抽采半径的影响。研究对指导现场瓦斯抽采以及促进煤矿安全生产具有重要意义。

In order to improve the gas drainage rate of coal mines and save gas drainage time,this paper analyzed the gas distribution characteristics of the heterogeneous coal seam and the gas migration laws of borehole drainage,and used the permeability coefficient to study the gas pressure distribution characteristics of the heterogeneous coal seam.The influence of single borehole gas pressure distribution,original gas pressure,and original permeability coefficient on the effective drainage radius in heterogeneous coal seams was analyzed.The research is of great significance to guide the gas extraction on site and promote the safe production of coal mines.