综合抽采技术在低透气性煤层中的应用

Application of Comprehensive Gas Drainage Technology in Coal Seam with Low Gas Permeability

随着开采深度的不断延伸,鹤煤公司八矿煤层中瓦斯含量逐渐增加,煤层透气性变差。经过试验研究,应用了瓦斯抽放综合技术、水力增透和带压封孔+低浓度修复技术,有效降低了工作面瓦斯含量,进一步提高了钻孔抽采浓度,增加了瓦斯抽放量。

With the increasing of mining depth,the gas content of coal seam in Hebi No. 8 Coal Mine is increasing gradually, and coal seam permeability is becoming poor. According to some researches, comprehensive gas drainage technology, permeability increasing technology using hydraulic fracturing and sealing hole with pressure plus repairing of gas drainage boreholes with low gas content was applied in the coal mine. The application of these methods effectively reduced the gas content on working face, and improved the extrac- tion concentration of gas drainage boreholes and gas extraction quantity.