艾维尔沟矿区抽采半径影响因素及其影响程度分析

Analysis on Influence Factors and Extent of Drainage Radius in Aiweiergou Mining Area

摘要: 为了掌握艾维尔沟矿区突出煤层瓦斯抽采半径的影响因素及其影响程度，采用Fluent14.0对抽采钻孔周围瓦斯流动的压力场和速度场进行数值模拟研究，并分析了钻孔直径、抽采负压及煤层渗透率对抽采半径的影响及影响程度。结果表明，钻孔周围煤体中瓦斯压力分布从钻孔中心向外增大，瓦斯流动速度分布从钻孔中心向外减小；钻孔直径、抽采负压和煤层渗透率对抽采半径具有影响，影响程度从大到小依次为煤层渗透率、钻孔直径、抽采负压。

Abstract: In order to grasp the influence factors and extent of drainage radius at outburst coal seam in Aiweiergou Mining Area, Fluent 14.0 software is used to study the gas flow pressure field and speed field around drainage borehole. The influence degree of drilling diameter, drainage negative pressure and coal permeability on drainage radius is analyzed. The results show that the gas pressure around boreholes becomes larger from the center to outer circle and the gas flow velocity gets smaller. Drilling diameter, drainage negative pressure and coal permeability affect drainage radius, the influence from big to small in turn is coal permeability, drilling diameter and drainage negative pressure.