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Comparison of coal briquettes permeability from mylonitized and undisturbed zone in 409/4 seam (Zofiówka Mine)
Kožušníková, Alena ; Wierzbicki, M.
The paper presents some experiments with gas flowing through coal briquettes made of mylonitic or undisturbed coal. The results of measurements of the gas flow, under triaxial stress state conditions, showed exponential dependence between permeability and confining pressure. Comparison of the measurements results, carried on briquettes made of mylonitic coal and made of normal coal, with the same porosity, showed that the disturbed coal material had higher permeability than undisturbed one.

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