Direct discharge of mine gas is not only a waste of natural resources but exacerbation of greenhouse effect.How to utilize the low concentration gas is an urgent task to study.

• 矿井回风流瓦斯直接排放到大气中,不仅造成了资源的浪费,而且加剧了温室效应,如何利用低浓度瓦斯是迫切需要研究的课题。