| Temperature field simulation of gob influenced by atmospheric pressure | |
| Alternative Title | Temperature field simulation of gob influenced by atmospheric pressure |
| Wang Gang1; Luo Haizhu2; Liang Yuntao2; Wang Jiren1 | |
| 2015 | |
| Source Publication | JOURNAL OF CENTRAL SOUTH UNIVERSITY
 |
| ISSN | 2095-2899 |
| Volume | 22Issue:11Pages:4366-4371 |
| Abstract | The current temperature field model of mine gob does not take the boundary conditions of the atmospheric pressure into account, while the actual atmospheric pressure is influenced by weather, so as to produce differences between ventilation negative pressure of the working face and the negative pressure of gas drainage in gob, thus interfering the calculated results of gob temperature field. According to the characteristics of the actual air flow and temperature change in gob, a two-dimensional temperature field model of the gob was built, and the relational model between the air pressure of intake and outlet of the gob and the atmospheric pressure was established, which was introduced into the boundary conditions of temperature field to conduct calculation. By means of analysis on the simulation example, and comparison with the traditional model, the results indicate that atmospheric pressure change had notable impact on the distribution of gob temperature field. The laboratory test system of gob temperature field was constructed, and the relative error between simulated and measured value was no greater than 9.6%, which verified the effectiveness of the proposed model. This work offers theoretical basis for accurate calculation of temperature and prediction of ignition source in mine gob, and has important implications on preventing spontaneous combustion of coal. |
| Other Abstract | The current temperature field model of mine gob does not take the boundary conditions of the atmospheric pressure into account, while the actual atmospheric pressure is influenced by weather, so as to produce differences between ventilation negative pressure of the working face and the negative pressure of gas drainage in gob, thus interfering the calculated results of gob temperature field. According to the characteristics of the actual air flow and temperature change in gob, a two-dimensional temperature field model of the gob was built, and the relational model between the air pressure of intake and outlet of the gob and the atmospheric pressure was established, which was introduced into the boundary conditions of temperature field to conduct calculation. By means of analysis on the simulation example, and comparison with the traditional model, the results indicate that atmospheric pressure change had notable impact on the distribution of gob temperature field. The laboratory test system of gob temperature field was constructed, and the relative error between simulated and measured value was no greater than 9.6%, which verified the effectiveness of the proposed model. This work offers theoretical basis for accurate calculation of temperature and prediction of ignition source in mine gob, and has important implications on preventing spontaneous combustion of coal. |
| Keyword | SPONTANEOUS COMBUSTION COAL PREDICTION MINES GOAF gob atmospheric pressure numerical simulation temperature field |
| Indexed By | CSCD |
| Language | 英语 |
| Funding Project | [National Science and Technology Support Program, China] ; [National Natural Science Foundation of China] ; [National Key Scientific Instrument and Equipment Development Project, China] |
| CSCD ID | CSCD:5598464 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/144518 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.Liaoning Tech University, Coll Safety Sci & Technol, Fuxing 123000, Peoples R China 2.中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Wang Gang,Luo Haizhu,Liang Yuntao,et al. Temperature field simulation of gob influenced by atmospheric pressure[J]. JOURNAL OF CENTRAL SOUTH UNIVERSITY,2015,22(11):4366-4371. |
| APA | Wang Gang,Luo Haizhu,Liang Yuntao,&Wang Jiren.(2015).Temperature field simulation of gob influenced by atmospheric pressure.JOURNAL OF CENTRAL SOUTH UNIVERSITY,22(11),4366-4371. |
| MLA | Wang Gang,et al."Temperature field simulation of gob influenced by atmospheric pressure".JOURNAL OF CENTRAL SOUTH UNIVERSITY 22.11(2015):4366-4371. |
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