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32 1 Vol.32 Supp.1
2013 1 Chinese Journal of Rock Mechanics and Engineering Jan .2013
( 454000)
(QSGS)
Boltzmann (LBM)
(1)
(2)
(3)
QSGS Boltzmann
TD 32 A 2013)1263210
THREE-DIMENSIONAL REPRESENTATION OF COALS
MICROSTRUCTURE AND NUMERICAL ANALYSIS OF ITS
PORE-PERMEABILITY SPATIAL-TEMPORAL EVOLUTION MODE
JIN YiSONG HuiboPAN JienanZHENG JunlingZHU Yibo
(School of Resources and EnvironmentHenan Polytechnic University Jiaozuo Henan454000China)
Abstract Equivalent construction method in statistics of coals pore structure was discussed and the spatial-
temporal evolution process of fluid flow was simulated at pore scale. First of allthe porous media model of coal
medium was constructed using modified quartet structure generation set(QSGS) algorithm which integrates the
nonlinear and anisotropic characteristics of coals pore structure. And thensingle-phase gas flow through pores
was simulated using lattice Boltzmann method. Based on the numerical simulation resultsthe main influential
factors and the evolution pattern of coals permeability before fluid flow achieve equilibrium state were analyzed.
The analysis results show that (1) Permeability in porous media is dominated by the channels connected by pores
with large sizebut the migration in the paths connected by small pore and micropore was concentration diffusion
behavior (2) In the same
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