In order to change the phenomenon of mining tension after the implementation of permeability improvement measures for low permeability coal seam,inspired by the oil displacement by imbibition mechanism of oil and gas reservoirs in the field of oil and gas reservoir mining,by building the experimental platform,under the constant pressure of the experimental system,the study on the effect of imbibition was conducted.The experimental results show that after water enters the coal,adsorption of gas in coal can he replaced to promot gas desorption;both the maximum amount and rate of imbibition have a positive correlation with water content.However,the difference between the adjacent points decreases with the increase of water content.In the initial stage,the speed increases quickly.Combined with the experimental study,a new method of using imbibition effect as supplementary measure to promote gas drainage in the late period is proposed.%针对低渗煤层增透措施后仍存在采掘紧张的情况,启发于油气藏开采领域渗吸驱油机理,通过搭建实验平台,在实验系统压力恒定条件下研究了外加水分对煤中瓦斯的渗吸效应.实验结果表明:水分进入煤体后,能够置换出煤中吸附瓦斯,促进吸附瓦斯解吸;最大渗吸量和渗吸率与含水率正相关,但相邻点的差值随着含水率的增加逐渐减少;渗吸初始阶段,渗吸速度增长快.为改善上述情况,结合实验研究,提出1种在瓦斯抽采后期利用渗吸作用作为补充措施的促抽方式.
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