摘要
采用瓦斯压力下降法和瓦斯含量下降法确定常村矿穿层和顺层钻孔的有效半径,探究常村煤矿3号煤层钻孔抽采瓦斯影响范围。最终得出顺层钻孔有效抽采半径测试结果:2701工作面顺层钻孔有效抽采半径为3.5 m,2702工作面顺层孔的有效半径是3.5 m。穿层钻孔有效抽采半径测试结果:2305工作面穿层钻孔有效抽采半径为4 m,2106工作面穿层钻孔的有效半径是3.5 m。造成钻孔抽采半径差异的影响因素包括煤层透气性、钻孔封孔质量、煤层顶底板含水。穿层钻孔和顺层钻孔产生差异的原因为钻孔周围煤体受力场和钻孔周围煤体瓦斯流场存在差异。
In this study,the effective radius of the method of gas pressure is determined and the effective radius of the drilling hole of 2701 working face is 3.5 m.The effective radius of 2702 working face is 3.5 m.The effective radius of the drilling hole of 2305 working face is 4 m.The effective radius of 2106 working face is 3.5 m.The causes of the difference in drilling extraction radius include:coal seam permeability,drilling sealing quality,and water content of coal seam roof.The reason for the difference between the layer drilling and the layer drilling is the difference between the coal body force field around the borehole and the difference between the gas flow field of the coal body around the borehole.
作者
米德芳
Mi Defang(Lu'an Chemical Group Changcun Coal Mine,Changzhi Shanxi 046102,China)
出处
《山西冶金》
2025年第4期137-139,142,共4页
Shanxi Metallurgy
关键词
瓦斯抽采
抽采半径
钻孔间距
gas extraction
extraction radius
drilling spacing
