Aiming at the problem of gas accumulation in the upper corner of Taitou Coal and Coke Group,this study analyzed the abnor-mal gas emission from the goaf due to geological factors and mining factors.The research results show that the adjacent layer gas and the syncline structural area are the main reasons for the gas emission from the goaf.At the same time,the failure to withdraw the anchor in time during mining leads to air leakage in the goaf,resulting in gas accumulation in the upper corner.In order to solve this problem,this study proposes a set of comprehensive measures,including the use of long-distance roof high-level drilling,intubation combined with wind plugging and other methods to control the gas problem in the goaf.After treatment,the gas concentration in the upper corner suc-cessfully dropped below 0.5%,effectively controlling the gas emission from the adjacent layer,avoiding gas exceeding the limit,and en-suring the safe and efficient production of the working face.
关键词
上隅角/瓦斯聚集/瓦斯抽采/长距离顶板高位钻孔/向斜构造
Key words
upper corner/gas accumulation/gas extraction/long distance top plate high-level drilling/syncline structure
维普
万方数据