ESTIMATION OF COAL PERMEABILITY BY RESULTS OF FILTRATION EXPERIMENTS AND FRACTURE MICROSTRUCTURAL ANALYSIS
T. V. Shilova, S. V. Serdyukov
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Coal, cleat, permeability, anisotropy, stress state, occurrence depth
Abstract
The microstructural analysis of tested coal is performed. The fracture width and sizes of coal micro-blocks along cleats are determined. The laboratory filtration tests are carried out. The coal cleat compressibility and the dependence of coal permeability on hydrostatic stress are determined by the obtained results. The permeability anisotropy along beddings planes is estimated. The predicted dependences of coal permeability along face and butt cleats on occurrence depth are obtained for uniaxial strain conditions.
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