Abstract
To explore the spatial-temporal evolution law of rock mass temperature in high geothermal roadway during mechanical ventilation, a series of experiments were conducted based on the physical simulation test system of thermal and humid environment in high geothermal roadway, which is a method independently developed by China University of Mining and Technology. The results indicate that during ventilation, the disturbed region of the temperature extends gradually from shallow area to deep area in the surrounding rock mass of the roadway. Meanwhile, the temperature increases as the exponential function from shallow area to deep, with steady decrease of the temperature gradient and heat flux. As the ventilation proceeds, the relationship between dimensionless temperature and dimensionless time approximately meets Hill function.
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Foundation item: Project(2014-6121) supported by Fundamental Research Funds for the Central Universities, China; Project(51504236) supported by the National Natural Science Foundation of China; Project supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions, China
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Zhang, Y., Wan, Zj., Gu, B. et al. Unsteady temperature field of surrounding rock mass in high geothermal roadway during mechanical ventilation. J. Cent. South Univ. 24, 374–381 (2017). https://doi.org/10.1007/s11771-017-3439-3
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DOI: https://doi.org/10.1007/s11771-017-3439-3