A thermal environment prediction method for a mine ventilation roadway based on a numerical method: A case study
Thermal environment prediction has become increasingly significant in recent years with its promise of wide application in underground structures. The current work presents a numerical method for the feasible and effective analysis of the airflow and surrounding rock temperatures in ultralong mine v...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-02-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23000394 |
| _version_ | 1797936364219531264 |
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| author | Yu Xu Zijun Li Gang Li Saeid Jalilinasrabady Xiaowei Zhai Yin Chen Bing Wang |
| author_facet | Yu Xu Zijun Li Gang Li Saeid Jalilinasrabady Xiaowei Zhai Yin Chen Bing Wang |
| author_sort | Yu Xu |
| collection | DOAJ |
| description | Thermal environment prediction has become increasingly significant in recent years with its promise of wide application in underground structures. The current work presents a numerical method for the feasible and effective analysis of the airflow and surrounding rock temperatures in ultralong mine ventilation roadways to understand their dynamic heat transfer. To reduce the modeling effort and computation time with satisfactory accuracy, the ventilation roadway is approximated as a one-dimensional (1D) line element. Still, the surrounding rock of the roadway remains three-dimensional (3D). An equivalent heat transfer coefficient calculates the dynamic heat transfer in the radial direction of the roadway. A case analysis of the Sanhejian coal mine ventilation roadways in China is performed, and a comparison between the simulated results and field measurements indicates that the predicted airflow temperature shows good agreement. The change in the underground thermal environment concerning ventilation time is systematically investigated in detail. The surrounding rock of the roadway adjusts the underground thermal environment through heat absorption or heat release, and the temperature distribution of the surrounding rock presents a ''V'' shape in winter and a ''W'' shape in summer. The self-compression of air contributes to a remarkable heat source for the increase in airflow temperature in the air intake shaft. A roadway with a low initial temperature of the surrounding rock after long-term ventilation can effectively cool the high-temperature airflow underground in early summer. The reduction in ventilation volume will increase the cooling degree of airflow by the surrounding rock in long-term ventilation roadways in summer. Still, the airflow will be heated more significantly in short-term ventilation roadways. In addition, the increase in the average annual ambient temperature will result in a linear rise in underground airflow temperature. |
| first_indexed | 2024-04-10T18:28:37Z |
| format | Article |
| id | doaj.art-383e0470b5a7472d8d493fc284c71a2b |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-04-10T18:28:37Z |
| publishDate | 2023-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-383e0470b5a7472d8d493fc284c71a2b2023-02-02T04:48:39ZengElsevierCase Studies in Thermal Engineering2214-157X2023-02-0142102733A thermal environment prediction method for a mine ventilation roadway based on a numerical method: A case studyYu Xu0Zijun Li1Gang Li2Saeid Jalilinasrabady3Xiaowei Zhai4Yin Chen5Bing Wang6School of Resources and Safety Engineering, Central South University, Changsha, 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, 410083, China; Corresponding author.State Key Laboratory of Safety and Health for Metal Mines, Maanshan, 243000, China; Corresponding author.Department of Earth Resources Engineering, Graduate School of Engineering, Kyushu University, Fukuoka, 819-0395, JapanState Key Laboratory of Green and Low-carbon Development of Tar-rich Coal in Western China, Xi'an University of Science and Technology, Xi'an, 710054, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, 410083, China; Xinjiang Kalatongke Mining Co. LTD, Altay, 830000, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, 410083, ChinaThermal environment prediction has become increasingly significant in recent years with its promise of wide application in underground structures. The current work presents a numerical method for the feasible and effective analysis of the airflow and surrounding rock temperatures in ultralong mine ventilation roadways to understand their dynamic heat transfer. To reduce the modeling effort and computation time with satisfactory accuracy, the ventilation roadway is approximated as a one-dimensional (1D) line element. Still, the surrounding rock of the roadway remains three-dimensional (3D). An equivalent heat transfer coefficient calculates the dynamic heat transfer in the radial direction of the roadway. A case analysis of the Sanhejian coal mine ventilation roadways in China is performed, and a comparison between the simulated results and field measurements indicates that the predicted airflow temperature shows good agreement. The change in the underground thermal environment concerning ventilation time is systematically investigated in detail. The surrounding rock of the roadway adjusts the underground thermal environment through heat absorption or heat release, and the temperature distribution of the surrounding rock presents a ''V'' shape in winter and a ''W'' shape in summer. The self-compression of air contributes to a remarkable heat source for the increase in airflow temperature in the air intake shaft. A roadway with a low initial temperature of the surrounding rock after long-term ventilation can effectively cool the high-temperature airflow underground in early summer. The reduction in ventilation volume will increase the cooling degree of airflow by the surrounding rock in long-term ventilation roadways in summer. Still, the airflow will be heated more significantly in short-term ventilation roadways. In addition, the increase in the average annual ambient temperature will result in a linear rise in underground airflow temperature.http://www.sciencedirect.com/science/article/pii/S2214157X23000394Mine ventilationDeep mineHeat hazardNumerical simulationHeat transfer of roadway |
| spellingShingle | Yu Xu Zijun Li Gang Li Saeid Jalilinasrabady Xiaowei Zhai Yin Chen Bing Wang A thermal environment prediction method for a mine ventilation roadway based on a numerical method: A case study Case Studies in Thermal Engineering Mine ventilation Deep mine Heat hazard Numerical simulation Heat transfer of roadway |
| title | A thermal environment prediction method for a mine ventilation roadway based on a numerical method: A case study |
| title_full | A thermal environment prediction method for a mine ventilation roadway based on a numerical method: A case study |
| title_fullStr | A thermal environment prediction method for a mine ventilation roadway based on a numerical method: A case study |
| title_full_unstemmed | A thermal environment prediction method for a mine ventilation roadway based on a numerical method: A case study |
| title_short | A thermal environment prediction method for a mine ventilation roadway based on a numerical method: A case study |
| title_sort | thermal environment prediction method for a mine ventilation roadway based on a numerical method a case study |
| topic | Mine ventilation Deep mine Heat hazard Numerical simulation Heat transfer of roadway |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23000394 |
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