Abstract

The results of calculations of permeability of coal beds by Kozeny-Carman model are reported. The applicability of the model is proven in the case of known total porosity and specific surface of pore volume of fossil coal that are measured by small-angle neutron scattering experiments. By means of the fractal theory, it is shown that when the depth of coal bed increases, the reduction of the fractal dimension results in enlarged volume of macropores that provide enhanced permeability and gas content of deep seated coal beds.

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