THERMAL SCIENCE

International Scientific Journal

Shi-Qiang Yang

,

Teng Teng

,

Jing Zhang

,

Guo-Liang Gao

,

Chao-Yang Ren

STUDY ON SEEPAGE CHARACTERISTICS AND MODEL OF ORTHOTROPIC ANISOTROPY COAL

ABSTRACT
The extraction of coalbed methane can ensure the safe production of coal mines and the efficient use of resources. According to the anisotropy of coal seam, CT spi­ral scanning and triaxial gas seepage tests are carried out, the seepage character­istics of orthotropic coal are analyzed, and a coal permeability model considering orthotropic structure is proposed. Results show that: The permeability of parallel bedding direction changes obviously with axial pressure. The confining pressure is 5 MPa, the permeability in the parallel bedding direction is about 1.6 times that of the vertical bedding, and the confining pressure is 13 MPa, the permeability in the parallel bedding direction is about 1.01 times that of the vertical bedding. The coal permeability model with anisotropic structure is verified by the experiment data in both parallel and vertical bedding directions, and shows great applicability. Re­search results provide references for the efficient development of coalbed methane.
KEYWORDS
orthotropic anisotropy, CT scan, triaxial seepage test, permeability model
PAPER SUBMITTED: 2024-03-11
PAPER REVISED: 2024-03-14
PAPER ACCEPTED: 2024-05-09
PUBLISHED ONLINE: 2024-09-28
DOI REFERENCE: https://doi.org/10.2298/TSCI2404485Y
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 4, PAGES [3485 - 3491]
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Study on seepage characteristics and model of orthotropic anisotropy coal

© 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