高瓦斯矿井综放工作面通风方式优化

Optimization of Ventilation Mode in Fully Mechanized Face of High Gas Mine

为解决高瓦斯矿井采空区瓦斯涌出量高和上隅角瓦斯管理困难等问题,对U型通风和W型通风方式下采空区瓦斯浓度进行数值模拟。结果表明:采用W型通风方式后,上隅角瓦斯浓度降低,工作面通风阻力减小37.5%,通风量提高26%,且采空区影响范围缩小40%,同时降低了巷道施工成本和高抽巷抽采费用,工作面瓦斯异常涌出风险降低。

In order to solve the problems such as high gas emission in goaf and difficult gas management in upper corner of high gas mine,the gas concentration in goaf under U-type ventilation and W-type ventilation is simulated numerically.The results show that:after adopting W-type ventilation mode,the gas concentration in the upper corner decreases,the ventilation resistance decreases by 37.5%,the ventilation rate increases by 26%,and the influence range of goaf is reduced by 40%.At the same time,the roadway construction cost and high drainage roadway drainage cost are reduced,and the risk of abnormal gas emission is reduced.