Thermos-Solid-Gas Coupling Dynamic Model and Numerical Simulation of Coal Containing Gas
Based on gas seepage characteristics and the basic thermo-solid-gas coupling theory, the porosity model and the dynamic permeability model of coal body containing gas were derived. Based on the relationship between gas pressure, principal stress and temperature, and gas seepage, the thermo-solid-gas...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2020/8837425 |
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| _version_ | 1832552539009056768 |
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| author | Xiao Fukun Meng Xin Li Lianchong Liu Jianfeng Liu Gang Liu Zhijun Xu Lei |
| author_facet | Xiao Fukun Meng Xin Li Lianchong Liu Jianfeng Liu Gang Liu Zhijun Xu Lei |
| author_sort | Xiao Fukun |
| collection | DOAJ |
| description | Based on gas seepage characteristics and the basic thermo-solid-gas coupling theory, the porosity model and the dynamic permeability model of coal body containing gas were derived. Based on the relationship between gas pressure, principal stress and temperature, and gas seepage, the thermo-solid-gas coupling dynamic model was established. Initial values and boundary conditions for the model were determined. Numerical simulations using this model were done to predict the gas flow behavior of a gassy coal sample. By using the thermo-solid-gas coupling model, the gas pressure, temperature, and principal stress influence, the change law of the pressure field, displacement field, stress field, temperature field, and permeability were numerically simulated. Research results show the following: (1) Gas pressure and displacement from the top to the end of the model gradually reduce, and stress from the top to the end gradually increases. The average permeability of the YZ section of the model tends to decrease with the rise of the gas pressure, and the decrease amplitude slows down from the top of the model to the bottom. (2) When the principal stress and temperature are constant, the permeability decreases first and then flattens with the gas pressure. The permeability increases with the decrease of temperature while the gas pressure and principal stress remain unchanged. |
| format | Article |
| id | doaj-art-efa7c6f6ca8a4c75be53844f08bd9cd7 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-efa7c6f6ca8a4c75be53844f08bd9cd72025-02-03T05:58:27ZengWileyGeofluids1468-81151468-81232020-01-01202010.1155/2020/88374258837425Thermos-Solid-Gas Coupling Dynamic Model and Numerical Simulation of Coal Containing GasXiao Fukun0Meng Xin1Li Lianchong2Liu Jianfeng3Liu Gang4Liu Zhijun5Xu Lei6School of Safety Engineering, Heilongjiang University of Science & Technology, Harbin Heilongjiang 150022, ChinaSchool of Safety Engineering, Heilongjiang University of Science & Technology, Harbin Heilongjiang 150022, ChinaSchool of Resources & Civil Engineering, Northeastern University, Shenyang Liaoning 110819, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan 610065, ChinaHeilongjiang Ground Pressure & Gas Control in Deep Mining Key Laboratory, Heilongjiang University of Science and Technology, Harbin, Heilongjiang 150022, ChinaCollege of Mining Engineering of Hust, Heilongjiang University of Science and Technology, Harbin Heilongjiang 150022, ChinaCollege of Mining Engineering of Hust, Heilongjiang University of Science and Technology, Harbin Heilongjiang 150022, ChinaBased on gas seepage characteristics and the basic thermo-solid-gas coupling theory, the porosity model and the dynamic permeability model of coal body containing gas were derived. Based on the relationship between gas pressure, principal stress and temperature, and gas seepage, the thermo-solid-gas coupling dynamic model was established. Initial values and boundary conditions for the model were determined. Numerical simulations using this model were done to predict the gas flow behavior of a gassy coal sample. By using the thermo-solid-gas coupling model, the gas pressure, temperature, and principal stress influence, the change law of the pressure field, displacement field, stress field, temperature field, and permeability were numerically simulated. Research results show the following: (1) Gas pressure and displacement from the top to the end of the model gradually reduce, and stress from the top to the end gradually increases. The average permeability of the YZ section of the model tends to decrease with the rise of the gas pressure, and the decrease amplitude slows down from the top of the model to the bottom. (2) When the principal stress and temperature are constant, the permeability decreases first and then flattens with the gas pressure. The permeability increases with the decrease of temperature while the gas pressure and principal stress remain unchanged.http://dx.doi.org/10.1155/2020/8837425 |
| spellingShingle | Xiao Fukun Meng Xin Li Lianchong Liu Jianfeng Liu Gang Liu Zhijun Xu Lei Thermos-Solid-Gas Coupling Dynamic Model and Numerical Simulation of Coal Containing Gas Geofluids |
| title | Thermos-Solid-Gas Coupling Dynamic Model and Numerical Simulation of Coal Containing Gas |
| title_full | Thermos-Solid-Gas Coupling Dynamic Model and Numerical Simulation of Coal Containing Gas |
| title_fullStr | Thermos-Solid-Gas Coupling Dynamic Model and Numerical Simulation of Coal Containing Gas |
| title_full_unstemmed | Thermos-Solid-Gas Coupling Dynamic Model and Numerical Simulation of Coal Containing Gas |
| title_short | Thermos-Solid-Gas Coupling Dynamic Model and Numerical Simulation of Coal Containing Gas |
| title_sort | thermos solid gas coupling dynamic model and numerical simulation of coal containing gas |
| url | http://dx.doi.org/10.1155/2020/8837425 |
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