Parameters of methane condition during phase transition at the outburst-hazardous coal seam edges

The authors analyze phase equilibrium of gaseous methane and crystalline hydrate particles in coal pores, considering absorbed heat during phase transition. It is shown that the crystallohydrate-gaseous methane phase equilibrium in small pores can be nonsteady; i.e., on deviation from the phase equi...

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Bibliographic Details
Published inJournal of mining science Vol. 49; no. 6; pp. 908 - 912
Main Authors Dyrdin, V. V., Smirnov, V. G., Shepeleva, S. A.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.11.2013
Springer
Subjects
Coal
Coal industry
Crystal structure
Deviation
Earth and Environmental Science
Earth Sciences
Gas hydrates
Geomechanics
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Hydrates
Methane
Mineral Resources
Outbursts
Phase transformations
Porosity
gas-dynamic events
gas hydrates
dissociation
coal seams
phase transitions
Underground mining
gas release
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Summary:The authors analyze phase equilibrium of gaseous methane and crystalline hydrate particles in coal pores, considering absorbed heat during phase transition. It is shown that the crystallohydrate-gaseous methane phase equilibrium in small pores can be nonsteady; i.e., on deviation from the phase equilibrium curve, the methane condition parameters change and, as a consequence, increase the deviation. Instantaneous dissociation of crystallohydrates builds up methane pressure, which intensifies outburst hazard and affects the outburst gas balance.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1062-7391
1573-8736
DOI:10.1134/S1062739149060099