Study on Original Coal Seam Permeability Coefficient
In the case of gas radial flowing in layer-though boring, use the method of draining water gathering gas measured the Gas flow of borehole that there is water flow out from drilling Sometimes,the coal seam gas permeability coefficient is calculated using"Radial Flow Method"and"Optimizing Method,found out the range of 5-3 original coal seam Hongmiao coal mine permeability coefficient is0.007~0.008 m2/(MPa2·d).
Qunjie Xu, Honghua Ge and Junxi Zhang
Z. W. Dong et al., "Study on Original Coal Seam Permeability Coefficient", Advanced Materials Research, Vols. 361-363, pp. 179-182, 2012