In order to study the mechanism and process of mercury migration under the influence of coal spontaneous combustion and coal field fire area. this paper uses the method of combining theory and experiment to study the migration of mercury. In this paper. the transport equation of mercury in porous medium and semi-infinite medium is established from the viewpoint of heat and mass transfer. https://www.spidertattooz.com/OPI-GelColor-Magnet-Tool-Mauvnetic-Poles-0-5-oz-p21159/