In-situ gas pressure calculation principle of pressure-maintaining coal samples and experimental verification in deep coal seams
Accurate determination of in-situ gas pressure in deep coal seams is the basic guarantee for safe production in coal mines, therefore, this paper is based on the in-situ pressure maintaining coring technology of deep coal seams, the gas pressure equilibrium process of pressure maintaining coal cores was simulated by carrying out decompression desorption experiments to validate the principle of in-situ gas pressure calculation for pressure maintaining coal samples of deep coal seams. The results of the study show that the theoretical values of in-situ gas pressure are in good agreement with the experimental values. The mean deviation is 0.126 MPa, 0.194 MPa, respectively, the average error is 5.085% and 8.319%, respectively. The experiments of desorption of pressure maintaining coal samples verified the reliability of the in-situ gas pressure calculation principle.
Authors
- Mingzhong Gao (ORCID: https://orcid.org/0000-0002-8399-421X)
- Zhenli Hao (ORCID: https://orcid.org/0000-0002-5233-1376)
- Pengfei Cui (ORCID: https://orcid.org/0000-0002-7238-4010)
- Yongcheng Li (ORCID: https://orcid.org/0000-0002-8542-7999)
- Jie Song (ORCID: https://orcid.org/0009-0005-9048-708X)
Institutions
- Shenzhen University (CN)
- Sichuan University (CN)
- Shanghai Construction Group (China) (CN)
Publication Details
- Journal
- Thermal Science
- Published
- 2025-01-01
- DOI
- https://doi.org/10.2298/tsci2502159g
- Primary Topic
- Coal Properties and Utilization
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Key Research and Development Program of China