Physical kinetics of coal-methane system: Mass transfer, pre-outburst events

Autor:	E. P. Feldman, T. A. Vasilenko, N. A. Kalugina
Rok vydání:	2014
Předmět:	Bearing (mechanical) business.industry Non-equilibrium thermodynamics Thermodynamics Geology Geotechnical Engineering and Engineering Geology Spall Methane law.invention Thermodynamic potential chemistry.chemical_compound chemistry law Mass transfer Coal Porosity business
Zdroj:	Journal of Mining Science. 50:448-464
ISSN:	1573-8736 1062-7391
Popis:	The article gives the review of the present-day development in the physical kinetics of coal-methane system. The Gibbs thermodynamic potential is derived for this system as the function of methane density (persisting order parameter) and coal jointing (non-persisting order parameter). The authors put forward epy diffusion-filtration mechanism of mass transfer in porous material on two time scales and substantiate the concept of “quick” and “slow” methane. Based on the nonequilibrium thermodynamic potential, kinetic equations are derived for gas pressure and jointing in coal (bed). The first equation solution explains the physical effect of temporal gas pressure growth at the maximum of the external rock (bearing) pressure, the second equation enables generalization of the Griffiths failure criterion for a set of gas-filled joints. Mechanism of pre-outburst spalling of gas-saturated coal is analyzed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bb6eea95106cbb7870838cd9f29dc245 https://doi.org/10.1134/s1062739114030077 Zobrazit plný text záznamu Plný text ve formátu PDF