Correlation analysis between combustion of underground residual coal and surface carbon flux in goaf
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.
goafcombustion of residual coalsoil surface CO2 fluxcorrelation analysissurface fissureenvironmental wind velocitysoil humidity