Microstructure of Coal before and after Gas-Dynamic Phenomena

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 val...

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Bibliographic Details
Published inJournal of mining science Vol. 55; no. 5; pp. 701 - 707
Main Authors Ul’yanova, E. V., Malinnikova, O. N., Pashichev, B. N., Malinnikova, E. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.09.2019
Springer
Springer Nature B.V
Subjects
Coal
Digital imaging
Earth and Environmental Science
Earth Sciences
Electron microscopy
Entropy
Entropy (Information theory)
Geomechanics
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Hazardous areas
Mathematical analysis
Microstructure
Mineral Resources
Nonuniformity
Outbursts
Scanning electron microscopy
Statistical methods
digital images of coal surface
statistical entropy and complexity
outburst-hazardous and outburst-nonhazardous zones
Coal
gas-dynamic phenomena
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Summary: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.
ISSN:1062-7391
1573-8736
DOI:10.1134/S1062739119056063