Numerical study on temperature field in the gob under different cooling control measures
The temperature and flow fields of the gob area are quantified in this paper. Firstly, a mathematical model for multi-physical coupling in the gob was established. The on-site test of Daqiang Coal Mine was conducted without injecting nitrogen, which verified the effectiveness of the model. The cooli...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-10-01
|
| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23007748 |
| _version_ | 1827803578425671680 |
|---|---|
| author | Hao Wang |
| author_facet | Hao Wang |
| author_sort | Hao Wang |
| collection | DOAJ |
| description | The temperature and flow fields of the gob area are quantified in this paper. Firstly, a mathematical model for multi-physical coupling in the gob was established. The on-site test of Daqiang Coal Mine was conducted without injecting nitrogen, which verified the effectiveness of the model. The cooling effect of the nitrogen injection decreases as the distance between the air inlet side and the working surface increases. In addition, the hot air extraction was clearly evaluated and the movement of hot air was analyzed. Both nitrogen injection and hot air extraction in the mining area have a significant effect on reducing the airflow temperature at the coal mining face. The air flow temperature with nitrogen injection at each location was lower than that without nitrogen injection along the direction of the coal face. In contrast, the air temperature on the return air corner is greatly reduced after the hot air extraction measures are taken and it can improve the air thermal state near the return air corner. We can provide effective solutions to the problems of spontaneous combustion and thermal damage in high-temperature mines through theoretical research and practical exploration. |
| first_indexed | 2024-03-11T20:57:23Z |
| format | Article |
| id | doaj.art-0e1f41003a8c4f499ea8860710704efb |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-03-11T20:57:23Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-0e1f41003a8c4f499ea8860710704efb2023-09-30T04:54:46ZengElsevierCase Studies in Thermal Engineering2214-157X2023-10-0150103468Numerical study on temperature field in the gob under different cooling control measuresHao Wang0Shenzhen Polytechnic University, College of Architecture Engineering, Shenzhen, 518055, ChinaThe temperature and flow fields of the gob area are quantified in this paper. Firstly, a mathematical model for multi-physical coupling in the gob was established. The on-site test of Daqiang Coal Mine was conducted without injecting nitrogen, which verified the effectiveness of the model. The cooling effect of the nitrogen injection decreases as the distance between the air inlet side and the working surface increases. In addition, the hot air extraction was clearly evaluated and the movement of hot air was analyzed. Both nitrogen injection and hot air extraction in the mining area have a significant effect on reducing the airflow temperature at the coal mining face. The air flow temperature with nitrogen injection at each location was lower than that without nitrogen injection along the direction of the coal face. In contrast, the air temperature on the return air corner is greatly reduced after the hot air extraction measures are taken and it can improve the air thermal state near the return air corner. We can provide effective solutions to the problems of spontaneous combustion and thermal damage in high-temperature mines through theoretical research and practical exploration.http://www.sciencedirect.com/science/article/pii/S2214157X23007748Numerical simulationMulti-physics couplingAir leakageTemperature fieldGob |
| spellingShingle | Hao Wang Numerical study on temperature field in the gob under different cooling control measures Case Studies in Thermal Engineering Numerical simulation Multi-physics coupling Air leakage Temperature field Gob |
| title | Numerical study on temperature field in the gob under different cooling control measures |
| title_full | Numerical study on temperature field in the gob under different cooling control measures |
| title_fullStr | Numerical study on temperature field in the gob under different cooling control measures |
| title_full_unstemmed | Numerical study on temperature field in the gob under different cooling control measures |
| title_short | Numerical study on temperature field in the gob under different cooling control measures |
| title_sort | numerical study on temperature field in the gob under different cooling control measures |
| topic | Numerical simulation Multi-physics coupling Air leakage Temperature field Gob |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23007748 |
| work_keys_str_mv | AT haowang numericalstudyontemperaturefieldinthegobunderdifferentcoolingcontrolmeasures |