There is a problem of high volume fraction of gas in the return air roadway in 1201 working face of Jinneng Coal Industry Co.,Ltd..According to the sub-source prediction method,the gas emission in the coal seam accounted for about 45%and that in the roof accounted for about 55%of the gas emission in the working face.During the mining process,the gas is mainly derived from the goaf.Combined with the site situation,the strengthening measures of plugging pipes in upper corner were put forward.After the implementation of the measures,the maximum volume fraction of gas in the upper corner during the mining of 1201 working face was 0.59%,and there was no phenomenon of gas overlimit.Comprehensive analysis showed that the strengthening measures of plugging pipes in upper corner effectively control the overlimit of gas in the corner of return air of 1201 working face.
关键词
瓦斯超限/瓦斯来源分析/上隅角插管
Key words
gas overrun/gas source analysis/plugging pipes in upper corner
维普
万方数据