MICROSTRUCTURE OF COAL BEFORE AND AFTER GAS-DYNAMIC PHENOMENA
a:2:{s:4:"TYPE";s:4:"HTML";s:4:"TEXT";s:118:"E. V. Ul’yanova1, O. N. Malinnikova1, B. N. Pashichev1, E. V. Malinnikova2";}
1Academician Melnikov Research Institute of Comprehensive Exploitation of Mineral Resources, Russian Academy of Sciences, Moscow, 111020 Russia
2Moscow State University of Geodesy and Cartography, Moscow, 107064 Russia
Keywords: Ископаемый уголь, газодинамические явления, выбросоопасные и невыбросоопасные зоны, цифровые изображения поверхности углей, статистические энтропия и сложность, Coal, gas-dynamic phenomena, outburst-hazardous and outburst-nonhazardous zones, digital images of coal surface, statistical entropy and complexity
Abstract
The applicability of calculated information entropy to quantification of coal structure nonuniformity at a microlevel is demonstrated. The calculations used digital images of coal surface from scanning electron microscopy after thousandfold increase. The calculated statistical entropy-complexity values enable comparing structural nonuniformity of coal sampled from outbursts, as well as from outburst-hazardous and outburst-nonhazardous zones. It is found that coal from outburst-hazardous zones contain areas of highly chaotic structure as against the ordered structure of coal from outburst-nonhazardous zones. Outburst coal is free from chaotic structures though its structure is less ordered than in coal from outburst-nonhazardous zones. The proposed method allows detecting the certainly outburst-nonhazardous zones in coal seams using digital images of coal samples.
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