Citation

Zhang X, Liu X, Dong W, Zhang H, Wang Y, Sasaki K. China Saf. Sci. J. 2022; 32(2): 66-73.

Copyright

(Copyright © 2022, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2022.02.010

PMID

unavailable

Abstract

In order to study status of spontaneous combustion in Dongbang abandoned goaf in Haizhou open-pit mine, based on characteristics of spontaneous combustion and gas diffusion theory of residual coal in goaf, Intelligent Soil Gas Flux Monitoring System was used to continuously (monthly) monitor soil surface CO2 fluxes at measuring points in Dongbang goaf. According to distribution characteristics of surface CO2 fluxes and soil temperature in the experimental region, emission range and variation of CO2 released from underground fire area were explored. At the same time, CO2 emission in the area was calculated and its variation with time was analyzed. The results show that soil surface CO2 fluxes are positively correlated with soil temperature. The area of high CO2 fluxes in the experimental region shows a trend of monthly expansion and increase. Moreover, CO2 emission gradually increases every month, and the annual emission in the experimental region is about 3. 6×106 m3. © 2022, Editorial Department of China Safety Science Journal. All rights reserved.

Language: zh