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Temperature field simulation of gob influenced by atmospheric pressure
Alternative TitleTemperature field simulation of gob influenced by atmospheric pressure
Wang Gang1; Luo Haizhu2; Liang Yuntao2; Wang Jiren1
2015
Source PublicationJOURNAL OF CENTRAL SOUTH UNIVERSITY
ISSN2095-2899
Volume22Issue:11Pages:4366-4371
AbstractThe 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 AbstractThe 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.
KeywordSPONTANEOUS COMBUSTION COAL PREDICTION MINES GOAF gob atmospheric pressure numerical simulation temperature field
Indexed ByCSCD
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 IDCSCD:5598464
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/144516
Collection中国科学院金属研究所
Affiliation1.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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