OPEN ACCESS
The similar simulation experiment platform for the temperature field of surrounding rock in roadway was established based on similarity theory. It was made possible to verify simulation results of the Finite Volume Method. In order to reveal the heat dissipation rules in roadway, the mathematical model of transient temperature field for the surrounding rock in roadway was established, and dimensionless parameters were introduced into the model to make the model non-dimensional. The Finite Volume Method based on triangular mesh was used to discretize the dimensionless equation and the dimensionless temperature distribution for the transient temperature field of surrounding rock in roadway was obtained. At the wall face in roadway, the dimensionless temperature decreases gradually with the increase of Biot coefficient and Fourier coefficient, and finally tends to a certain value. The curves of the unstable heat transfer criterion and the corresponding laws of variation were obtained by further calculation. The numerical results have shown that the unstable heat transfer criterion decreases with the increase of the Fourier number at a constant Biot coefficient, while it increases with the increase of Biot coefficient at a constant Fourier coefficient. The research results in this paper provide a simple and reliable algorithm to determine the unstable heat transfer criterion derived from the corresponding parameter values of an arbitrary transient temperature field of surrounding rock in roadway. For mine cooling technicians, it provides important reference basis to calculate the chilling requirements and study the heat dissipation rules of surrounding rock in roadway.
similar simulation experiment, transient, roadway, dimensionless, unstable heat transfer criterion
This work was supported by the National Natural Science Foundation of China (Grant No. 51574249).
[1] Loredo C, Banks D, Roqueñí N. (2017). Evaluation of analytical models for heat transfer in mine tunnels. Geothermics 69: 153-164. http://doi.org/10.1016/j.geothermics.2017.06.001
[2] Donoghue AM. (2004). Heat illness in the U.S. mining industry. Am. J. Ind. Med. 45(4): 351-356. https://doi.org/10.1002/ajim.10345
[3] Guo PY, Zhu GL, He MC. (2014). HEMS technique for heat-harm control and geo-thermal utilization in deep mines. International Journal of Coal Science and Technology 1(3): 289-296. https://doi.org/10.1007/s40789-014-0036-z
[4] Kenny GP, Vierula M, Maté J, Beaulieu F, Hardcastle SG, Reardon F. (2012). A field evaluation of the physiological demands of miners in Canada's deep mechanized mines. Journal of Occupational and Environmental Hygiene 9(8): 491-501. https://doi.org/10.1080/15459624.2012.693880
[5] Qin YP, Kong S, Liu W, Wu JS, Song HT. (2015). Dimensionless analysis of the temperature field of surrounding rock in coalface with a finite volume method. International Journal of Heat and Technology 33(3): 151-157. https://doi.org/10.18280/ ijht.330323
[6] Kalkowsky B, Kampmann B. (2006). Physiological strain of miners at hot working places in German coal mines. Ind. Health 44(3): 465-473. https://doi.org/10.2486/indhealth.44.465
[7] Wallace K, Prosser B, Stinnette JD. (2015). The practice of mine ventilation engineering. International Journal of Mining Science and Technology 25(2): 165-169. http://doi.org/10.1016/j.ijmst.2015.02.001
[8] Nikodem S, Dariusz O, Marek K. (2017). Analysis of connecting a forcing fan to a multiple fan ventilation network of a real-life mine. Process Safety and Environmental Protection 107(2): 468-479. https://doi.org/10.1016/j.psep.2017.03.001
[9] Ryan A, Euler DS. (2017). Heat stress management in underground mines. International Journal of Mining Science and Technology 27(4): 651-655. https://doi.org/10.1016/j.ijmst.2017.05.020
[10] Yang XJ, Han QY, Pang JW, Shi XW. (2011). Progress of heat-hazard treatment in deep mines. Mining Science and Technology (China) 21(2): 295-299. https://doi.org/10.1016/j.mstc.2011.02.015
[11] Wu SY, Wang YM. (1989). Study on coefficient of heat transfer of tunnel wall. Uranium Mining and Metallurgy 8(4): 55-58. https://doi.org/10.13426/j.Cnki.yky.1989.04. 009
[12] Wu SY, Wang YM. (1993). Study of heat and mass transfer coefficients of wet tunnel walls. Journal of China Coal Society 18(1): 41-51. https://doi.org/10.13225/j.cnki.jccs.1993.01.010
[13] Kajzar V, Pavelek Z, Koníček P, Kukutsch R. (2017). Investigation into the temperature fields of the carboniferous rock mass in the Czech part of the Upper Silesian Coal Basin. Procedia Engineering 191: 583-590. https://doi.org/10.1016/j.proeng.2017.05.221
[14] Kondjoyan A, Daudin JD. (1993). Determination of transfer coefficients by psychrometry. International Journal of Heat and Mass Transfer 36(7): 1807-1808. https://doi.org/10.1016/S0017-9310(05)80167-X
[15] Lowndes IS, Yang ZY, Jobling S, Yates C. (2006). A parametric analysis of a tunnel climatic prediction and planning model. Tunneling and Underground Space Technology 21(5): 520-532. https://doi.org/10.1016/j.tust.2005.08.012
[16] Taraba B, Slovak V, Michalec Z, Chura J. (2008). Development of oxidation heat of the coal left in the mined-out area of a long wall face: modeling using the fluent software. Journal of Mining and Metallurgy, Section B: Metallurgy 44(1): 73-81. https://doi.org/10.2298/jmmb0801073t
[17] Noureddine B, Sassi BN. (2001). Mass and heat transfer during water evaporation in laminar flow inside a rectangular channel-validity of heat and mass transfer analogy. International Journal of Thermal Science 40(1): 67-81. https://doi.org/10.1016/S1290-0729(00)01181-9
[18] Coelho PJ. (2014). Advances in the discrete ordinates and finite volume methods for the solution of radiative heat transfer problems in participating media. Journal of Quantitative Spectroscopy and Radiative Transfer 145: 121-146. https://doi.org/10.1016/j.jqsrt.2014.04.021
[19] Шербань AH. (1982). Heat transfer coefficient, unsteady heat, transfer coefficient and moisture exchange coefficient, mine cooling guide. chap. 13, China Coal Industry Publishing House, Beijing.
[20] Zhang X.X. (2000). Heat convection, thermal engineering, chap. 10, Higher Education Press, Beijing.
[21] Liu W, Song HT, Li XF. (2014). Dimensionless analysis on gas emission law around tunneling face. Journal of China Coal Society 40(4): 882-887. https://doi.org/10.13225/j.cnki.jccs.2014.3024