STUDY ON SEEPAGE CHARACTERISTICS AND MODEL OF ORTHOTROPIC ANISOTROPY COAL

被引：1
|
作者：
Yang, Shi-Qiang [1 ]
Teng, Teng [1 ,2 ,3 ]
Zhang, Jing [1 ]
Gao, Guo-Liang [1 ]
Ren, Chao-Yang [1 ]
机构：
[1] China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing, Peoples R China
[2] Henan Polytech Univ, State Key Lab Cultivat Base Gas Geol & Gas Control, Jiaozuo, Peoples R China
[3] China Univ Min & Technol Beijing, Beijing Key Lab Precise Min Intergrown Energy & Re, Beijing, Peoples R China
来源：
THERMAL SCIENCE | 2024年 / 28卷 / 4B期
关键词：
orthotropic anisotropy; CT scan; triaxial seepage test; permeability model; PERMEABILITY; POROSITY;
D O I：
10.2298/TSCI2404485Y
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
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.
引用
收藏
页码：3485 / 3491
页数：7
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