摘要
应用RFPA2D-Flow软件,对影响钻孔瓦斯抽采效果的钻孔直径、抽采时间和抽采负压进行了数值模拟研究,分析了瓦斯抽采过程中煤层瓦斯的径向流动情况。结果表明:增大钻孔直径能够使钻孔周围煤体卸压范围增加,大幅度提高煤层瓦斯抽采效果;随着抽采时间增长,瓦斯抽采效果越好,但抽采效率会降低;抽采负压降低,抽采半径增幅较小,对瓦斯抽采效果影响不大。
By using numerical simulation software RFPA2D-Flow, reached Boring Drainage result impressed with drainage borehole diameter,extraction time and drainage negative pressure by numerically simulation, Analyzed gas radial flowing situation during the gas drainage.The results showed that:Therelesded range around boring was increased and the effect inspection was enhanced large while the boring enlarged;Theeffect inspection was better, but the efficient was lower when increased the extraction time;Gas drainage radius was amplificedsmall,and the efficient ineffect inspection was small too,while the drainage negative pressure was lower.
出处
《煤炭技术》
CAS
北大核心
2014年第6期33-35,共3页
Coal Technology
关键词
钻孔直径
抽采时间
抽采负压
数值模拟
drainage borehole diameter
extraction time
drainage negative pressure
numerical simulation
