Citation

Qu G, Li H, Jia T, Qiang Q, Wang L. China Saf. Sci. J. 2021; 31(12): 69-77.

Copyright

(Copyright © 2021, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2021.12.010

PMID

unavailable

Abstract

In order to study spontaneous combustion characteristics of trapezoidal coal piles, and to build a remote monitoring system of coal pile temperature, based on theories of fluid dynamics and heat and mass transfer of porous media, a multi-field coupling mathematical model for spontaneous combustion of coal piles was established by using temperature distribution function on the windward side of the stockpile, and variation situations of temperature with wind speed under conditions of different porosity of coal piles were simulated. The results show that at a certain porosity, when wind speed is low, the maximum internal temperature of the pile and that of coal 0. 75 m deep increase along with that of wind speed. But for the condition of a higher wind speed, their temperature gradually decrease with the increase of wind speed. Under the same external environment, the lower the porosity is, the harder it will be to cause spontaneous combustion, but considerations should be given to conditions around coal piles. © 2021 China Safety Science Journal. All rights reserved.

Language: zh