Experimental investigation of gas seepage characteristics in coal seams under gas-water-stress function
Abstract Seepage experiences were conducted on coal samples with diverse levels of moisture content, gas pressure, and effective stress to investigate how gas seepage in a coal seam is affected by the interaction of gas, water, and stress. The results of the study revealed the intricate relationship...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-85265-y |
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| author | Zunguo Zhang Chao Tang Yi Chen Yongqiang Chen Honghu Zhang Yifu Zhang |
| author_facet | Zunguo Zhang Chao Tang Yi Chen Yongqiang Chen Honghu Zhang Yifu Zhang |
| author_sort | Zunguo Zhang |
| collection | DOAJ |
| description | Abstract Seepage experiences were conducted on coal samples with diverse levels of moisture content, gas pressure, and effective stress to investigate how gas seepage in a coal seam is affected by the interaction of gas, water, and stress. The results of the study revealed the intricate relationship between these factors and their impact on the permeability and seepage behavior of coal. The findings indicate that, with increasing gas pressure, the permeability of coal specimens containing different levels of moisture varies distinctly. When coal samples have low moisture content, their permeability displays a pattern of “increase - decrease - increase” as gas pressure increases. However, with the further increase of moisture content, the “increase-decrease” trend of permeability with the increase of gas pressure disappears. The relationship between permeability and effective stress can be modeled using either a quadratic or logarithmic function. On the other hand, the connection between permeability and moisture content, can be represented by a quadratic or exponential function. At low levels of moisture content, gas pressure has the most pronounced effect on permeability of coal samples, followed by moisture content and effective stress. Conversely, at high levels of moisture content, the most influential factor is moisture content, followed by gas pressure and effective stress. Finally, a model of permeability has been developed that takes into account the collective impacts of gas pressure, moisture content, and effective stress. The research outcomes can establish a basis for optimizing gas recovery from coal seams. |
| format | Article |
| id | doaj-art-f1fc6793228f4e8c8411ea3273a65046 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-f1fc6793228f4e8c8411ea3273a650462025-01-19T12:17:47ZengNature PortfolioScientific Reports2045-23222025-01-0115111310.1038/s41598-025-85265-yExperimental investigation of gas seepage characteristics in coal seams under gas-water-stress functionZunguo Zhang0Chao Tang1Yi Chen2Yongqiang Chen3Honghu Zhang4Yifu Zhang5College of Safety Science and Engineering, Liaoning Technical UniversityCollege of Safety Science and Engineering, Liaoning Technical UniversityCollege of Safety Science and Engineering, Liaoning Technical UniversityCollege of Safety Science and Engineering, Liaoning Technical UniversityCollege of Safety Science and Engineering, Liaoning Technical UniversitySchool of Safety and Management Engineering, Hunan Institute of TechnologyAbstract Seepage experiences were conducted on coal samples with diverse levels of moisture content, gas pressure, and effective stress to investigate how gas seepage in a coal seam is affected by the interaction of gas, water, and stress. The results of the study revealed the intricate relationship between these factors and their impact on the permeability and seepage behavior of coal. The findings indicate that, with increasing gas pressure, the permeability of coal specimens containing different levels of moisture varies distinctly. When coal samples have low moisture content, their permeability displays a pattern of “increase - decrease - increase” as gas pressure increases. However, with the further increase of moisture content, the “increase-decrease” trend of permeability with the increase of gas pressure disappears. The relationship between permeability and effective stress can be modeled using either a quadratic or logarithmic function. On the other hand, the connection between permeability and moisture content, can be represented by a quadratic or exponential function. At low levels of moisture content, gas pressure has the most pronounced effect on permeability of coal samples, followed by moisture content and effective stress. Conversely, at high levels of moisture content, the most influential factor is moisture content, followed by gas pressure and effective stress. Finally, a model of permeability has been developed that takes into account the collective impacts of gas pressure, moisture content, and effective stress. The research outcomes can establish a basis for optimizing gas recovery from coal seams.https://doi.org/10.1038/s41598-025-85265-yGas pressureMoisture contentEffective stressSeepage characteristicsSensitivity coefficientSeepage model |
| spellingShingle | Zunguo Zhang Chao Tang Yi Chen Yongqiang Chen Honghu Zhang Yifu Zhang Experimental investigation of gas seepage characteristics in coal seams under gas-water-stress function Scientific Reports Gas pressure Moisture content Effective stress Seepage characteristics Sensitivity coefficient Seepage model |
| title | Experimental investigation of gas seepage characteristics in coal seams under gas-water-stress function |
| title_full | Experimental investigation of gas seepage characteristics in coal seams under gas-water-stress function |
| title_fullStr | Experimental investigation of gas seepage characteristics in coal seams under gas-water-stress function |
| title_full_unstemmed | Experimental investigation of gas seepage characteristics in coal seams under gas-water-stress function |
| title_short | Experimental investigation of gas seepage characteristics in coal seams under gas-water-stress function |
| title_sort | experimental investigation of gas seepage characteristics in coal seams under gas water stress function |
| topic | Gas pressure Moisture content Effective stress Seepage characteristics Sensitivity coefficient Seepage model |
| url | https://doi.org/10.1038/s41598-025-85265-y |
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