The coal piles stacked in the open yard are the main source of dust pollution in the coal terminal.The implementation of dust suppression for each coal pile in the current port management relies on experience and the characteristics of the dust generation area are not fully considered，resulting in poor dust suppression or wasted resources.Therefore，a quantitative study of fugitive dust diffusion in open yards at coal terminals considering changes in external influences is carried out in this paper.Taking a coal export terminal yard in northern China as an example，multiple combinations of experimental conditions at different wind speeds and various wind incidence angles (0°，45°，90°) are considered.A numerical simulation of the dust diffusion in each pile is carried out using computational fluid dynamics (CFD) software to visualize the specific areas of dust emission and to calculate the amount of dust emissions on the surface of the piles.The characteristics of dust emissions from coal piles at different locations are analyzed specifically providing a theoretical reference for dust suppression operations in the corresponding yard conditions.