高瓦斯矿井沿空留巷瓦斯治理技术研究与应用

Research and application of gas control technology for gob-side entry retaining in high gas mine

本文从瓦斯防治方面对沿空留巷技术安全应用进行研究,分析了华烨煤业4105回风顺槽留巷段2次瓦斯超限,提出了布置留巷顶板瓦斯抽采系统,增设瓦斯涌出监测方式,优化通风系统和合理选择采空区喷涂封闭时间等一系列高瓦斯矿井沿空留巷瓦斯治理技术,并在高瓦斯矿井华烨煤矿进行了应用。结果表明,4105工作面回采期间工作面瓦斯浓度由0.37%降低至0.15%,留巷巷道内甲烷浓度稳定在0.1%~0.15%,工作面成功实现沿空留巷1050 m,验证了无煤柱自成巷沿空留巷技术在高瓦斯矿井应用的可行性,同时也为类似条件矿井瓦斯治理提供了思路和手段。

This paper studies the safety application of gob-side entry retaining technology from the aspect of gas prevention and control,analyzes the 2 times of gas overrun in the 4105 return air roadway section of Huaye Coal Industry,and puts forward a series of gas control technologies for gob-side entry retaining in high gas mine,such as arranging the gas drainage system of the roof of the retaining roadway,adding the gas emission monitoring method,optimizing the ventilation system and reasonably selecting the spraying and sealing time of the goaf,which are applied in Huaye Coal Mine of high gas mine.The results show that during the mining period of 4105 working face,the gas concentration in the working face is reduced from 0.15%to 0.15%,the methane concentration in the retained roadway is stable at 0.1%~0.15%,and the working face successfully realizes 1050 m gob-side entry retaining.The feasibility of the application of gob-side entry retaining technology without coal pillar in high gas mine is verified,and it also provides ideas and means for gas control in mines with similar conditions.