高抽巷的合理空间层位及抽采效果分析

Analysis of Drainage Effect and Reasonable Horizon of High Level Suction Roadway

为解决综放面、采空区及上隅角瓦斯频繁超限问题,以五阳煤矿7603综放面为工程背景,提出了高抽巷抽采瓦斯方案,通过理论计算得到高抽巷与煤层顶板垂直距离为35m,与回风巷水平距离为40m;利用数值模拟对5种方案下瓦斯抽采效果进行分析,得到当高抽巷位于层位2时,即S=40m,H=35m时瓦斯抽采效果最好,上隅角和回风巷瓦斯浓度为0.5%~0.7%;工业性试验结果表明:正常生产期间回风巷瓦斯浓度在0.5%~0.6%范围内,上隅角瓦斯浓度在0.6%~0.8%范围内,瓦斯浓度能够控制在0.8%以内,保证了7603综放面正常安全高效生产,为类似条件工作面回采提供指导。

In order to solve the problem of gas transfinite frequently in fully mechanized coal mining face,goaf and upper corner,it taking 7603 fully mechanized coal mining face of Wuyang coal mine as engineering background,and gas drainage scheme of high level suction roadway was put forward,the vertical distance between high level suction roadway and coal seam roof was 35 m was put forward after calculation,the horizontal distance to ventilation roadway was 40 m,gas drainage effect of different five schemes were analyzed by numerical simulation,the gas drainage reached the best when high level suction roadway located in layer 2（S = 40 m,H = 35m）,gas density in upper corner and ventilation roadway was 0. 5% - 0. 7%; the industrial test showed that gas density were 0. 5% - 0. 6% and0. 6% - 0. 8% in upper corner and ventilation roadway respectively during mining process,and it could be controlled less than 0. 8%,safety and high efficient production of fully mechanized coal mining face was ensured,it references for similar situation.