近距煤层群高瓦斯矿井采空区大直径钻孔抽采瓦斯技术研究

Study on Large Diameter Drilling of High Gas Cubic Drainage Technology in Contiguous Seams

小回沟煤矿属于高瓦斯矿井,主采03~#、2~#煤层,间距16 m左右,属于典型的近距离煤层群高瓦斯矿井,在开采03~#、2~#煤过程中邻近煤岩层瓦斯大量涌入开采空间,为了有效治理矿井采空区瓦斯及上隅角瓦斯超限的难题,针对目前采空区埋管抽采瓦斯存在的流量小、浓度低,不易管理的特点,设计采用采空区大直径管孔抽采采空区瓦斯的技术方案。结果表明:合理的抽采钻孔直径、抽采钻孔间距参数,可以为小回沟煤矿瓦斯治理提供理论及技术支撑。

Xiaohuigou coal mine belongs to the high gas mine, the main mining of No. 03 and No. 2 coal seam, the distance is about 16 m, which belongs to the typical high-gas coal mine in the near- distance coal seam. In the process of mining coal No. 03 and No. 2, in order to effectively control the gas and over the comer of the mine gas and over the corner of the problem, for the current goaf mining gas drainage of small flow, low concentration, easy to manage the characteristics of the design of large diameter pipe. The results show that the reasonable drilling diameter and the drilling distance parameters are obtained, which can provide the support of theory and technology for the gas control of Xiaohuigou coal mine.