Citation

Zhang J, Shi S, Lu Y, You B. China Saf. Sci. J. 2020; 30(10): 149-155.

Copyright

(Copyright © 2020, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2020.10.021

PMID

unavailable

Abstract

In order to explore key scientific issues of prevention and control of gas and coal spontaneous combustion in mines, and to develop intelligent technology and equipment as well as to ensure safe mining of high gassy and flammable coal seam, based on complex evolution process of multi-scale, multi-temporal and multi-physical-chemical field coupling, symbiotic disasters were analyzed from two aspects, namely inhibition of gas on coal oxidation and spontaneous combustion and impacts of the latter on gas explosion limit. Then, a fluid solid coupling model of gas drainage and a fluid solid thermal coupling model of coal spontaneous combustion were established to reveal mechanism of symbiotic disasters considering deformation process of coal matrix caused by its gas diffusion and seepage, fracture gas air mixed flow and coal adsorption or desorption. Finally, prevention and control theory and technology were summarized, and future development trend was prospected. The results show that such symbiotic disaster is an outcome of multiple coupling in air leakage oxygen field, heat storage temperature field, gas distribution field, etc., and the key of its prevention and control lies in accurate identification of dynamic risks, real-time early warning and rapid implementation of responsive measures. © 2020 China Safety Science Journal. All rights reserved.

Language: zh