水锁对含瓦斯煤体的瓦斯解吸的影响

Impact of water lock on gas desorption of coal with gas

受石油与天然气开采界水锁损害研究的启示,利用自主研发的外液侵入条件下瓦斯解吸实验装置,实验获得了0.025%渗透剂溶液侵入条件下对瓦斯自然解吸的影响。结果表明:外液的侵入能够降低瓦斯的解吸量,对于2.0,1.5,1.0和0.5 MPa四个含瓦斯压力水平而言,在1 h以内能够将瓦斯解吸量降低7%～26%,在12 h时能降低26%～41%,说明利用水锁防止工作面瓦斯超限具有可行性。

Enlightenment by the study of water lock damage in oil and natural gas mining field, used independent re- search and development gas desorption experimental measuring device under external solution invasion, experiment ob- tained the 0. 025 % penetrant solution invasion influence to gas natural desorption. The results show that external solu- tion invasion can reduce gas desorption quantity, to gas pressure is 2.0,1.5,1.0 and 0. 5 MPa says, external solution can make gas desorption quantity reduce 7% -26% in 1 h,and reduce 26% -41% in 12 h,indicated it has feasible that use water lock to prevent gas exceeding limit on coal face.