Numerical Analysis and Prediction of Coal Mine Methane Drainage Based on Gas–Solid Coupling Model
Methane drainage using boreholes is one of the most effective means of preventing coal mine methane disasters. However, the distributions of stress and permeability around the borehole and the effective influence radius of methane drainage are not clearly known. To solve this problem, a mathematical...
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| Format: | Article |
| Language: | English |
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Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek
2019-01-01
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| Series: | Tehnički Vjesnik |
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| Online Access: | https://hrcak.srce.hr/file/322640 |
| _version_ | 1797207411840253952 |
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| author | Mingyun Tang Pengxian Zheng Chunshan Zheng Zuxiang Hu Jinhui Wang Guanglong Dai |
| author_facet | Mingyun Tang Pengxian Zheng Chunshan Zheng Zuxiang Hu Jinhui Wang Guanglong Dai |
| author_sort | Mingyun Tang |
| collection | DOAJ |
| description | Methane drainage using boreholes is one of the most effective means of preventing coal mine methane disasters. However, the distributions of stress and permeability around the borehole and the effective influence radius of methane drainage are not clearly known. To solve this problem, a mathematical model of gas–solid coupling of coal rock was first established in this study based on the Kozeny–Carman equation. In this model, the coal rock was considered as a fracture–porosity dual medium. Methane’s flow was seepage in the fracture system and diffused in the pore system. Second, the finite volume method was used to discretize the coupling model. The Newton–Raphson iteration and generalized minimal residual algorithm method were used to solve the nonlinear coupling equation after diffusion. Finally, Fortran language was used to simulate the process of methane drainage using a borehole. Results showed that there was respectively stress concentration on the left and right sides of the borehole. This area was associated with the lower permeability in these zones and destroyed the borehole, which is the one of the main reasons for the low efficiency of methane drainage. The relationship between the effective influence radius and the drainage time could be described by a power function. The effective influence radius of the borehole, cumulative methane drainage volume, and residual methane content distribution obtained by simulation were well consistent with the data obtained by the actual measurements, which proves the credibility of the gas–solid coupling and solving methods. This study provides some theoretical reference for methane drainage and the solution of multi-physics field coupling model in coal mines. |
| first_indexed | 2024-04-24T09:22:29Z |
| format | Article |
| id | doaj.art-6198deaa79a74ebaae976a0ebb3a724e |
| institution | Directory Open Access Journal |
| issn | 1330-3651 1848-6339 |
| language | English |
| last_indexed | 2024-04-24T09:22:29Z |
| publishDate | 2019-01-01 |
| publisher | Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek |
| record_format | Article |
| series | Tehnički Vjesnik |
| spelling | doaj.art-6198deaa79a74ebaae976a0ebb3a724e2024-04-15T15:35:16ZengFaculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in OsijekTehnički Vjesnik1330-36511848-63392019-01-0126375276110.17559/TV-20190224105205Numerical Analysis and Prediction of Coal Mine Methane Drainage Based on Gas–Solid Coupling ModelMingyun Tang0Pengxian Zheng1Chunshan Zheng2Zuxiang Hu3Jinhui Wang4Guanglong Dai5(1) State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology / (2) School of Mining and Safety Engineering, Anhui University of Science and Technology, No. 168 Taifeng StreeSchool of Mining and Safety Engineering, Anhui University of Science and Technology, No. 168 Taifeng Street, 232001 Huainan, Anhui Province, China(1) State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology / (2) School of Mining and Safety Engineering, Anhui University of Science and Technology, No. 168 Taifeng Stree(1) State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology / (2) School of Mining and Safety Engineering, Anhui University of Science and Technology, No. 168 Taifeng StreeSchool of Mechanical, Aerospace and Civil Engineering, University of Machester, George Begg Building, M13 9PL Machester, UK(1) State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology / (2) School of Mining and Safety Engineering, Anhui University of Science and Technology, No. 168 Taifeng StreeMethane drainage using boreholes is one of the most effective means of preventing coal mine methane disasters. However, the distributions of stress and permeability around the borehole and the effective influence radius of methane drainage are not clearly known. To solve this problem, a mathematical model of gas–solid coupling of coal rock was first established in this study based on the Kozeny–Carman equation. In this model, the coal rock was considered as a fracture–porosity dual medium. Methane’s flow was seepage in the fracture system and diffused in the pore system. Second, the finite volume method was used to discretize the coupling model. The Newton–Raphson iteration and generalized minimal residual algorithm method were used to solve the nonlinear coupling equation after diffusion. Finally, Fortran language was used to simulate the process of methane drainage using a borehole. Results showed that there was respectively stress concentration on the left and right sides of the borehole. This area was associated with the lower permeability in these zones and destroyed the borehole, which is the one of the main reasons for the low efficiency of methane drainage. The relationship between the effective influence radius and the drainage time could be described by a power function. The effective influence radius of the borehole, cumulative methane drainage volume, and residual methane content distribution obtained by simulation were well consistent with the data obtained by the actual measurements, which proves the credibility of the gas–solid coupling and solving methods. This study provides some theoretical reference for methane drainage and the solution of multi-physics field coupling model in coal mines.https://hrcak.srce.hr/file/322640Coal mine methaneEffective influence radiusFinite volume methodGas–solid couplingMaximum principal stressNumerical simulation |
| spellingShingle | Mingyun Tang Pengxian Zheng Chunshan Zheng Zuxiang Hu Jinhui Wang Guanglong Dai Numerical Analysis and Prediction of Coal Mine Methane Drainage Based on Gas–Solid Coupling Model Tehnički Vjesnik Coal mine methane Effective influence radius Finite volume method Gas–solid coupling Maximum principal stress Numerical simulation |
| title | Numerical Analysis and Prediction of Coal Mine Methane Drainage Based on Gas–Solid Coupling Model |
| title_full | Numerical Analysis and Prediction of Coal Mine Methane Drainage Based on Gas–Solid Coupling Model |
| title_fullStr | Numerical Analysis and Prediction of Coal Mine Methane Drainage Based on Gas–Solid Coupling Model |
| title_full_unstemmed | Numerical Analysis and Prediction of Coal Mine Methane Drainage Based on Gas–Solid Coupling Model |
| title_short | Numerical Analysis and Prediction of Coal Mine Methane Drainage Based on Gas–Solid Coupling Model |
| title_sort | numerical analysis and prediction of coal mine methane drainage based on gas solid coupling model |
| topic | Coal mine methane Effective influence radius Finite volume method Gas–solid coupling Maximum principal stress Numerical simulation |
| url | https://hrcak.srce.hr/file/322640 |
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