THERMAL SCIENCE

International Scientific Journal

Yi Xue

,

Zhengzheng Cao

,

Faning Dang

,

Zongyuan Ma

,

Jun Gao

NUMERICAL SIMULATION OF DAMAGE AND PERMEABILITY EVOLUTION MECHANISM OF COAL SEAM UNDER MICROWAVE RADIATION

ABSTRACT
Microwave heating is an effective method to improve the recovery rate of coalbed CH4. In this study, a fully coupled electromagnetic thermodynamic model was developed to study the effects of coal compaction, thermal expansion and thermal gas desorption on coal deformation. The simulation results show that although in the initial stage, the decrease of gas pressure by microwave is not obvious, the distribution of gas pressure in coal seam is obviously affected by microwave after a period of time. The microwave can also affect the mineral composition of rocks, cause rock damage, promote the development of cracks, and promote the increase of permeability
KEYWORDS
microwave heating, Coupled model, Gas desorption, Thermal-damage, Partial differential equations (PDEs)
PAPER SUBMITTED: 2018-05-12
PAPER REVISED: 2018-06-21
PAPER ACCEPTED: 2018-08-21
PUBLISHED ONLINE: 2019-04-14
DOI REFERENCE: https://doi.org/10.2298/TSCI180512133X
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 3, PAGES [1355 - 1361]
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PDF VERSION [DOWNLOAD]
Numerical simulation of damage and permeability evolution mechanism of coal seam under microwave radiation

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence