Aiming at the mutual influence of dust emissions from coal piles in an open yard of coal terminal,by setting different wind angles and wind speeds,the study uses numerical simulation methods combined with the emission factor formula proposed by United States Environmental Protection Agency (EPA) to quantitatively analyze the dust emission characteristics of existing coal piles on adjacent piles at different locations in the yard.The dust intensity of different pile positions is then visualized.The results show that under wind angles of 0°,45°,and 90°,the maximum dust emission amounts are 2.08,3.70,and 2.60 kg,respectively.Under wind angles of 0° and 45°,the position with the lowest dust intensity is located at the downwind pile position.At a 90° wind angle,the shielding effect of the coal piles exhibits a symmetrical pattern.The research results can provide reference for spray operation.