以孔代巷联合抽采在高瓦斯煤层群的应用

Application of Combined Extraction with Hole Replacing Roadway in High Gas Seam Group

赤峪煤矿为典型的近距离煤层群,且煤层具有透气性低、瓦斯含量高的特点。以孔代巷联合抽采技术具有施工简单、抽采效率高的特点,在赤峪煤矿使用中大幅扩大了钻场间距,并在采空区形成了抽采负压区,减少了采空区向回风隅角涌出瓦斯,提升了矿井瓦斯治理能力。

Chiyu Coal Mine is a typical short-range coal seam group,and the coal seam is characterized by low permeability and high gas content.The combined extraction technology of"hole replacing roadway"has the characteristics of simple construction and high extraction efficiency.In the use of Chiyu Coal Mine,the drilling field spacing has been greatly expanded,and a negative pressure area for extraction has been formed in the goaf,reducing the gas emission from the goaf to the return air corner,and improving the mine gas control ability.