地面立孔抽放技术在特厚煤层瓦斯治理中的应用

Application of Ground Vertical Hole Drainage Technology in Gas Control of Special Thick Seam

针对高瓦斯低透气性特厚煤层回采期问瓦斯涌出量大,抽放率不高的问题,通过经济和技术比较,确定采用地面立孔抽放技术,研究了地面立孔抽采技术在特厚煤层8204工作面中的应用情况,结果表明:8204工作面抽出瓦斯浓度最高可达28.69%,平均浓度3.5%左右,能够有效地降低采空区中的瓦斯含量;瓦斯抽放率在15~35 m^3/min之间波动,总体上保持稳定。

For the problems of large gas emission and low drainage rate in special thick seam mining with high gas content and low permeability, and through the comprehensive comparison of economy and technology, the ground vertical hole drainage technology is determined to use in mine, and the application of ground vertical hole drainage technology at 8204 special thick seam working face is studied. The gas extraction concentration at 8204 working face is up to 28.69% and the average concentration is about 3.5%, and it can effectively reduce the gas content in the mined-out area; gas drainage rate fluctuates between 15 m^3/min and 35 m^3/min and remains stable on the whole.