Proceedings of the 2023 5th International Conference on Civil Architecture and Urban Engineering (ICCAUE 2023)

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Pressure variation law of CO2 injection target area in coal seams

Authors
Qingze He1, *, Ping He2, 3, 4, Zhishen Li1, Yingxin Li1, Shuya Wang1
1College of Emergency Management and Safety Science and Engineering, North China University of Science and Technology, Tangshan, Hebei, 063210, China
2CCCC Tianjin Port Engineering Institute Co., Ltd., Tianjin, 300222, China
3CCCC First Harbor Engineering Company Ltd., Tianjin, 300456, China
4Key Laboratory of Coastal Engineering Hydrodynamic, CCCC, Tianjin, 300222, China
*Corresponding author. Email: 1299421339@qq.com
Corresponding Author
Qingze He
Available Online 12 February 2024.
DOI
10.2991/978-94-6463-372-6_9How to use a DOI?
Keywords
Rock and soil seepage; Carbon dioxide injection; Gas pressure; Numerical simulation; Quantitative analysis
Abstract

Gas outburst accidents are prone to occur during coal mining, and injecting CO2 into the coal body can achieve the goal of gas displacement. At the same time, this method will cause changes in the permeability of the coal body, leading to deformation, fracture, and other factors affecting the stability of the coal body. Therefore, it is of great significance to study the pressure changes in the target area of CO2 injection into coal. The COMSOL software was used to simulate the CO2 injection process into coal. The research results showed that as the displacement process progressed, the range of CO2 influence gradually increased, and the gas pressure in the target area decreased while the CO2 pressure increased. The direction of drilling to the boundary of the coal body is affected by injection pressure and extraction, and the CO2 and gas pressures are constantly decreasing. Some areas may experience gas pressure rising above the initial gas pressure.

Copyright
© 2024 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 2023 5th International Conference on Civil Architecture and Urban Engineering (ICCAUE 2023)
Series
Atlantis Highlights in Engineering
Publication Date
12 February 2024
ISBN
10.2991/978-94-6463-372-6_9
ISSN
2589-4943
DOI
10.2991/978-94-6463-372-6_9How to use a DOI?
Copyright
© 2024 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Qingze He
AU  - Ping He
AU  - Zhishen Li
AU  - Yingxin Li
AU  - Shuya Wang
PY  - 2024
DA  - 2024/02/12
TI  - Pressure variation law of CO₂ injection target area in coal seams
BT  - Proceedings of the 2023 5th International Conference on Civil Architecture and Urban Engineering (ICCAUE 2023)
PB  - Atlantis Press
SP  - 80
EP  - 87
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-372-6_9
DO  - 10.2991/978-94-6463-372-6_9
ID  - He2024
ER  -