Experimental study on the gas desorption law in coal affected by dynamic water injection
Abstract Water from hydraulic technology affects the desorption of gas from coal seams. Gas desorption behavior is critical information for gas control in coal mines. In this study, a designed coal seam water injection simulation experimental device was utilized to conduct dynamic water injection ex...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-12-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-49607-y |
| _version_ | 1797388321599520768 |
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| author | Tianwei Shi Aiwen Wang Lianpeng Dai Gang Wang |
| author_facet | Tianwei Shi Aiwen Wang Lianpeng Dai Gang Wang |
| author_sort | Tianwei Shi |
| collection | DOAJ |
| description | Abstract Water from hydraulic technology affects the desorption of gas from coal seams. Gas desorption behavior is critical information for gas control in coal mines. In this study, a designed coal seam water injection simulation experimental device was utilized to conduct dynamic water injection experiments on coal samples at different adsorption equilibrium pressures, analyzing the gas desorption law under dynamic water injection, as well as the role of water replacement, water imbibition and water blockage in gas desorption. The results showed that water altered the gas desorption rate in coal, causing fluctuating attenuation of the desorption rate of a water-injected coal sample (WCS). Under the same adsorption equilibrium pressure, the relationship between the desorption rate of the WCS and the non-water-injected coal samples (NCS) underwent a transition in desorption time. In contrast to the NCS desorption curves, the WCS desorption curves lacked a rapid growth phase and exhibited only a slow growth phase and a stopping phase. Water imbibition and water replacement promoted the desorption of gas in the non-wet area during the water injection process, while it inhibited the desorption of gas in the wet area. Under the effects of water imbibition, water blockage, and water replacement, the discharge rate of WCS is greater than the desorption rate of NCS, indicating that water injection increases the total amount of gas desorption. The study results have significant implications for gas extraction and the prevention and control of coal and gas outbursts. |
| first_indexed | 2024-03-08T22:39:05Z |
| format | Article |
| id | doaj.art-198d3715fa7e4837a8261e25cb9a248d |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-08T22:39:05Z |
| publishDate | 2023-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-198d3715fa7e4837a8261e25cb9a248d2023-12-17T12:16:09ZengNature PortfolioScientific Reports2045-23222023-12-0113111110.1038/s41598-023-49607-yExperimental study on the gas desorption law in coal affected by dynamic water injectionTianwei Shi0Aiwen Wang1Lianpeng Dai2Gang Wang3Institute of Disaster Rock Mechanics, Liaoning UniversityInstitute of Disaster Rock Mechanics, Liaoning UniversityInstitute of Disaster Rock Mechanics, Liaoning UniversityInstitute of Disaster Rock Mechanics, Liaoning UniversityAbstract Water from hydraulic technology affects the desorption of gas from coal seams. Gas desorption behavior is critical information for gas control in coal mines. In this study, a designed coal seam water injection simulation experimental device was utilized to conduct dynamic water injection experiments on coal samples at different adsorption equilibrium pressures, analyzing the gas desorption law under dynamic water injection, as well as the role of water replacement, water imbibition and water blockage in gas desorption. The results showed that water altered the gas desorption rate in coal, causing fluctuating attenuation of the desorption rate of a water-injected coal sample (WCS). Under the same adsorption equilibrium pressure, the relationship between the desorption rate of the WCS and the non-water-injected coal samples (NCS) underwent a transition in desorption time. In contrast to the NCS desorption curves, the WCS desorption curves lacked a rapid growth phase and exhibited only a slow growth phase and a stopping phase. Water imbibition and water replacement promoted the desorption of gas in the non-wet area during the water injection process, while it inhibited the desorption of gas in the wet area. Under the effects of water imbibition, water blockage, and water replacement, the discharge rate of WCS is greater than the desorption rate of NCS, indicating that water injection increases the total amount of gas desorption. The study results have significant implications for gas extraction and the prevention and control of coal and gas outbursts.https://doi.org/10.1038/s41598-023-49607-y |
| spellingShingle | Tianwei Shi Aiwen Wang Lianpeng Dai Gang Wang Experimental study on the gas desorption law in coal affected by dynamic water injection Scientific Reports |
| title | Experimental study on the gas desorption law in coal affected by dynamic water injection |
| title_full | Experimental study on the gas desorption law in coal affected by dynamic water injection |
| title_fullStr | Experimental study on the gas desorption law in coal affected by dynamic water injection |
| title_full_unstemmed | Experimental study on the gas desorption law in coal affected by dynamic water injection |
| title_short | Experimental study on the gas desorption law in coal affected by dynamic water injection |
| title_sort | experimental study on the gas desorption law in coal affected by dynamic water injection |
| url | https://doi.org/10.1038/s41598-023-49607-y |
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