考虑孔隙裂隙及滑动效应的影响,建立符合成庄矿的顺层钻孔抽采气固耦合模型,利用Comsol软件模拟了钻孔周围的瓦斯流动规律,得出了有效抽采半径与时间的幂函数关系,并模拟了不同抽采负压、渗透率、钻孔孔径及地应力的变化对瓦斯抽采有效半径的影响,结果显示渗透率是影响抽采半径的关键因素。
Considering the effect of pore fissure and sliding,bedding drilling mining seepage model of Chengzhuang Coal Mine was established,and using Comsol software to simulate the gas flow pattern around the borehole,come to the relation between the effective radius of extraction time,and analysing different negative pressure,permeability,borehole diameter,in-situ stress on the effects of the gas extraction. Results have shown that the permeability is the key factor of influencing the radius of gas extraction.