Study on seepage characteristics and model of orthotropic anisotropy coal-Reference-Cited by-同舟云学术

Study on seepage characteristics and model of orthotropic anisotropy coal

Published:2024 Issue:4 Part B Volume:28 Page:3485-3491
ISSN:0354-9836
Container-title:Thermal Science
language:en
Short-container-title:Therm sci

Author:

Yang Shi-Qiang¹,Teng Teng²,Zhang Jing¹,Gao Guo-Liang¹,Ren Chao-Yang¹

Affiliation:

1. School of Energy and Mining Engineering, China University of Mining and Technology Beijing, Beijing, China

2. School of Energy and Mining Engineering, China University of Mining and Technology Beijing, Beijing, China + State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo, China + Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining and Technology-Beijing, Beijing, China

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 spi?ral scanning and triaxial gas seepage tests are carried out, the seepage character?istics 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. Re?search results provide references for the efficient development of coalbed methane.

Publisher

National Library of Serbia

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