Correlation analysis between combustion of underground residual coal and surface carbon flux in goaf

doi:10.16265/j.cnki.issn1003-3033.2024.02.0420

Abstract

Abstract:

In order to explore the response mechanism of spontaneous combustion of underground coal and surface carbon flux under complex conditions, the surface CO₂ flux, soil temperature, fissure, environmental wind velocity and soil humidity in Fuxin Haizhou open-pit mine were monitored for a long time. Field tests, data analysis and other methods were applied to study the correlation between the underground coal spontaneous combustion and surface CO₂ flux. The influence of surface fissure, environmental wind velocity and soil humidity on the response mechanism of underground coal spontaneous combustion-surface carbon flux were analyzed. The results show that underground coal combustion is the fundamental factor triggering the abnormal surface carbon flux response. The surface CO₂ flux is positively correlated with the surface soil temperature distribution. Surface fissure is the main factor affecting the surface CO₂ flux distribution. The environmental wind speed is positively correlated with the surface CO₂ flux. The surface CO₂ flux response is generally not affected by soil humidity, but it is greatly affected by rainfall.

Key words: goaf, combustion of residual coal, soil surface CO₂ flux, correlation analysis, surface fissure, environmental wind velocity, soil humidity

CLC Number:

X936

WANG Yongjun, ZHENG Qian, ZHANG Hemeng, DONG Wei, ZHANG Xiaoming, SASAKI Kyuro. Correlation analysis between combustion of underground residual coal and surface carbon flux in goaf[J]. China Safety Science Journal, 2024, 34(2): 161-167.

Figures/Tables 9

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