近距离煤层群瓦斯异常区域防治

Prevention and Control of Gas Abnormal Areas in Close Coal Seam Groups

为了实现对近距离煤层群坚硬顶板工作面瓦斯赋存异常区域瓦斯的有效防治,开展了近距离煤层群工作面瓦斯涌出规律研究,考察了坚硬顶板工作面顶板"三带"分布规律,优化了走向高位钻孔参数,建立了近距离煤层群坚硬顶板工作面"本煤层瓦斯抽排+采空区瓦斯抽采+邻近层瓦斯抽采+其他治理瓦斯措施"的瓦斯防治模式。经采用,工作面瓦斯涌出量由15.78 m^(3)/min降至11.1 m^(3)/min,平均值由10 m^(3)/min降至6.5 m3/min,工作面风量由1800 m^(3)/min降至1100 m^(3)/min,瓦斯治理效果明显。

In order to realize the effective prevention and control of gas in the gas abnormal area in working face with hard roof in close coal seam groups,this paper carried out study on the gas emission law of the working face in the close coal seam groups,investigated the roof"three-zone"distribution law of the working face with hard roof,optimized strike high drilling parameters,and established a gas control model of"local coal seam gas drainage+goaf gas drainage+adjacent layer gas drainage+other gas control measures"in the working face hard roof in close coal seam groups.After adoption,the gas emission from the working face was reduced from 15.78 m^(3)/min to 11.1 m^(3)/min,and the average value was reduced from 10 m^(3)/min to 6.5 m^(3)/min;the air volume at the working face was reduced from 1800 m^(3)/min to 1100 m^(3)/min.The gas treatment effect is obvious.