Numerical simulation analysis of effect of borehole gas extraction under fluid‐structure interaction
Abstract To study the effect of coal pressure on gas extraction under fluid‐solid coupling, the effect of gas extraction radius under different pore sizes and treatment methods was simulated by using COMSOL Multiphysics software, the time evolution law of gas pressure on coal surface was obtained, a...
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Wiley
2024-11-01
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| Series: | Energy Science & Engineering |
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| Online Access: | https://doi.org/10.1002/ese3.1945 |
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| author | Lin Wang Ziyao Yang Xiangjun Chen Shuailong Feng |
| author_facet | Lin Wang Ziyao Yang Xiangjun Chen Shuailong Feng |
| author_sort | Lin Wang |
| collection | DOAJ |
| description | Abstract To study the effect of coal pressure on gas extraction under fluid‐solid coupling, the effect of gas extraction radius under different pore sizes and treatment methods was simulated by using COMSOL Multiphysics software, the time evolution law of gas pressure on coal surface was obtained, and the numerical simulation results were verified by the observation of flow rate and concentration in experimental mine combined with fluid‐solid interaction. The results show that the distance of extraction radius increases with the increase of borehole diameter, and the relation between extraction time and extraction radius is a power function, but the increase gets smaller and smaller until it becomes zero. For Φ98 mm borehole and Φ120 mm borehole, hydraulic treatment can increase the efficiency of gas extraction by 31.3% and 22.7%, respectively. For hydraulic treatment and conventional treatment, the ratio of gas drainage effect by enlarging hole size is 6.3% and 13.8% respectively. Compared with the areas without gas extraction under the four conditions, the descending speed of gas pressure from fast to slow is Φ120 mm hydraulic flushing treatment, Φ98 mm hydraulic flushing treatment, Φ120 mm conventional treatment, Φ98 mm conventional treatment. Compared with four different conditions, after 180 days of extraction the coal gas pressure decreased by 75.3% within reasonable hole spacing. At the same time, in multi‐hole pumping, the influence area of adjacent borehole is larger than that of single‐hole pumping, and the spacing of borehole should be less than twice the radius of pumping. |
| format | Article |
| id | doaj-art-f5f8f34989ad452c946c13184998de3e |
| institution | Kabale University |
| issn | 2050-0505 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Wiley |
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| series | Energy Science & Engineering |
| spelling | doaj-art-f5f8f34989ad452c946c13184998de3e2025-01-06T14:45:33ZengWileyEnergy Science & Engineering2050-05052024-11-0112115185519910.1002/ese3.1945Numerical simulation analysis of effect of borehole gas extraction under fluid‐structure interactionLin Wang0Ziyao Yang1Xiangjun Chen2Shuailong Feng3College of Safety Science and Engineering Henan Polytechnic University Jiaozuo ChinaCollege of Safety Science and Engineering Henan Polytechnic University Jiaozuo ChinaCollege of Safety Science and Engineering Henan Polytechnic University Jiaozuo ChinaCollege of Safety Science and Engineering Henan Polytechnic University Jiaozuo ChinaAbstract To study the effect of coal pressure on gas extraction under fluid‐solid coupling, the effect of gas extraction radius under different pore sizes and treatment methods was simulated by using COMSOL Multiphysics software, the time evolution law of gas pressure on coal surface was obtained, and the numerical simulation results were verified by the observation of flow rate and concentration in experimental mine combined with fluid‐solid interaction. The results show that the distance of extraction radius increases with the increase of borehole diameter, and the relation between extraction time and extraction radius is a power function, but the increase gets smaller and smaller until it becomes zero. For Φ98 mm borehole and Φ120 mm borehole, hydraulic treatment can increase the efficiency of gas extraction by 31.3% and 22.7%, respectively. For hydraulic treatment and conventional treatment, the ratio of gas drainage effect by enlarging hole size is 6.3% and 13.8% respectively. Compared with the areas without gas extraction under the four conditions, the descending speed of gas pressure from fast to slow is Φ120 mm hydraulic flushing treatment, Φ98 mm hydraulic flushing treatment, Φ120 mm conventional treatment, Φ98 mm conventional treatment. Compared with four different conditions, after 180 days of extraction the coal gas pressure decreased by 75.3% within reasonable hole spacing. At the same time, in multi‐hole pumping, the influence area of adjacent borehole is larger than that of single‐hole pumping, and the spacing of borehole should be less than twice the radius of pumping.https://doi.org/10.1002/ese3.1945directional drillingextraction radiusfluid‐solid couplinggas extractionhydraulic punching |
| spellingShingle | Lin Wang Ziyao Yang Xiangjun Chen Shuailong Feng Numerical simulation analysis of effect of borehole gas extraction under fluid‐structure interaction Energy Science & Engineering directional drilling extraction radius fluid‐solid coupling gas extraction hydraulic punching |
| title | Numerical simulation analysis of effect of borehole gas extraction under fluid‐structure interaction |
| title_full | Numerical simulation analysis of effect of borehole gas extraction under fluid‐structure interaction |
| title_fullStr | Numerical simulation analysis of effect of borehole gas extraction under fluid‐structure interaction |
| title_full_unstemmed | Numerical simulation analysis of effect of borehole gas extraction under fluid‐structure interaction |
| title_short | Numerical simulation analysis of effect of borehole gas extraction under fluid‐structure interaction |
| title_sort | numerical simulation analysis of effect of borehole gas extraction under fluid structure interaction |
| topic | directional drilling extraction radius fluid‐solid coupling gas extraction hydraulic punching |
| url | https://doi.org/10.1002/ese3.1945 |
| work_keys_str_mv | AT linwang numericalsimulationanalysisofeffectofboreholegasextractionunderfluidstructureinteraction AT ziyaoyang numericalsimulationanalysisofeffectofboreholegasextractionunderfluidstructureinteraction AT xiangjunchen numericalsimulationanalysisofeffectofboreholegasextractionunderfluidstructureinteraction AT shuailongfeng numericalsimulationanalysisofeffectofboreholegasextractionunderfluidstructureinteraction |