THERMAL SCIENCE
International Scientific Journal
EFFECT OF DAMAGE ON GAS SEEPAGE MECHANISM IN COAL SEAM BASED ON A COUPLED MODEL
ABSTRACT
Damage has a significant impact on gas migration in coal seam. In this paper, a coupled hydraulic-mechanical-damage model is established, which takes into account the coupling relationship among coal damage, gas seepage and coal deformation. The simulation results show that the damage of coal body has little effect on seepage characteristic in the initial stage, but the influence of damage on gas seepage is increasing with the increase of time. Both the distribution of gas pressure and the gas adsorption content of coal body have a significant change.
KEYWORDS
PAPER SUBMITTED: 2018-03-19
PAPER REVISED: 2018-06-21
PAPER ACCEPTED: 2018-08-15
PUBLISHED ONLINE: 2019-04-14
THERMAL SCIENCE YEAR
2019, VOLUME
23, ISSUE
Issue 3, PAGES [1323 - 1328]
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