Study on gas permeability coefficient measurement of coal seam by radial flow method

For the accurate measurement of the coal seam permeability coefficient, the application range of the coal seam permeability coefficient was studied under various gas flow conditions with the guidance of the coal seam gas flow theory. Adopting the radial flow method, the measurement and calculation of the permeability coefficient of the coal seam C_13-1 in Xinji No.1 Coal Mine shows that the permeability coefficient of the original coal seam C_13-1 is less than 0.1, and the coal seam is difficult to extract. (paper)