Abstract: To address the limited effectiveness of dust prevention technologies such as ventilation dust removal and spray dust suppression in fully mechanized mining faces with high dust concentrations, the study used the 11309 fully mechanized mining face at Shanxi Hongyuan Group Fujiawa Coal Industry Co., Ltd. as a case study. Using Fluent software, a physical model of the mining face was constructed, and numerical simulations were conducted to analyze airflow field distribution characteristics and dust migration patterns. The numerical simulation results indicated that, when positive pressure ventilation ducts were used to supply air to the fully mechanized mining face, the airflow descended along the wall surface and diffused. Influenced by the suction force of the ventilation and dust extraction ducts, the airflow formed vortices, which gradually weakened and disappeared with increasing distance from the mining face. The airflow velocity in the working face area was relatively high, while it gradually decreased along the axial direction of the roadway. Dust concentration decreased as the distance from the mining face increased, with higher dust concentrations observed near the position of the machine operator. Based on these findings, a disturbance deflection dust control technology was proposed based on the concept of using airflow to control dust. By implementing a disturbance deflection device to the positive pressure ventilation duct, optimizing the layout of the duct outlets, and reducing the airflow at the frontmost outlet of the duct, the radial airflow near the machine operator was increased. Additionally, the dust extraction fan's suction duct was moved to the front, altering the airflow direction in the roadway, achieving dust control and removal. Engineering tests verified the reliability of the numerical simulation results and the disturbance deflection device. The results showed that the dust concentration in the fully mechanized mining face significantly decreased after using the disturbance deflection device, with a dust suppression efficiency of over 90%.