LAPSE:2023.36840
Published Article
LAPSE:2023.36840
Thermo-Mechanical Numerical Analysis of Stress and Damage Distribution within the Surrounding Rock of Underground Coal Gasification Panels
November 30, 2023
Underground coal gasification (UCG) is a promising technology for extracting synthesis gas from coal seams through in situ gasification. This study aims to investigate the thermo-mechanical behavior and integrity of the surrounding rock in the gasification vicinity to facilitate safe and efficient UCG operations. Rock property testing experiments are conducted under varying temperature conditions, revealing significant temperature dependencies for the thermal and mechanical parameters. A thermo-mechanical coupling model is developed to analyze the stress and damage distribution near the gasification chamber. The influence of the temperature dependency of stress states and failure risks during the gasification process is evaluated. In addition, the effects of panel orientation, chamber width, maintaining duration, operating temperature and operating pressure on the failure behavior of the gasification surrounding rocks are illustrated through parametric analysis. The findings have practical implications for the design and assessment of UCG processes, enhancing the safety and efficiency of coal gasification operations.
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Keywords
damage distribution, failure mechanisms, rock properties, temperature dependency, thermo-mechanical behavior, underground coal gasification
Subject
Suggested Citation
Wang P, Deng J, Liu W, Xiao Q, Lv Q, Zhang Y, Hou Y. Thermo-Mechanical Numerical Analysis of Stress and Damage Distribution within the Surrounding Rock of Underground Coal Gasification Panels. (2023). LAPSE:2023.36840
Author Affiliations
Wang P: College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Petroleum Resources & Engineering, Beijing 102249, China [ORCID]
Deng J: College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Petroleum Resources & Engineering, Beijing 102249, China
Liu W: College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Petroleum Resources & Engineering, Beijing 102249, China
Xiao Q: Engineering and Technology Operating Center, Hainan Branch of CNOOC Ltd., Haikou 570100, China
Lv Q: Liaohe Oilfield Company of CNPC Ltd., Panjin 124010, China
Zhang Y: College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Petroleum Resources & Engineering, Beijing 102249, China
Hou Y: Xibu Drilling Engineering Company of CNPC Ltd., Urumqi 830015, China
Deng J: College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Petroleum Resources & Engineering, Beijing 102249, China
Liu W: College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Petroleum Resources & Engineering, Beijing 102249, China
Xiao Q: Engineering and Technology Operating Center, Hainan Branch of CNOOC Ltd., Haikou 570100, China
Lv Q: Liaohe Oilfield Company of CNPC Ltd., Panjin 124010, China
Zhang Y: College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Petroleum Resources & Engineering, Beijing 102249, China
Hou Y: Xibu Drilling Engineering Company of CNPC Ltd., Urumqi 830015, China
Journal Name
Processes
Volume
11
Issue
9
First Page
2521
Year
2023
Publication Date
2023-08-22
Published Version
ISSN
2227-9717
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Original Submission
Other Meta
PII: pr11092521, Publication Type: Journal Article
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Published Article
LAPSE:2023.36840
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External Link
doi:10.3390/pr11092521
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Version History
[v1] (Original Submission)
Nov 30, 2023
Verified by curator on
Nov 30, 2023
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https://psecommunity.org/LAPSE:2023.36840
Original Submitter
Calvin Tsay
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