Dust removal by ventilation is a commonly used dust control strategy. This study analyses the characteristics of airflow transport and dust pollution on a fully mechanised top-coal caving face at different inlet wind velocities by using a numerical simulation experiment, and the best wind velocity for dust suppression is obtained. When the inlet wind velocity fluctuates in the range of 0.5 to 3.0 m/s, the overall dust mass concentration on the working face initially increases and then remains stable, but in the range of 2.5 to 3.0 m/s, the changes in the overall dust mass concentration and dust mass concentration of the respiratory zone on the working face are not significant. The dust pollution in the respiratory zone produced by the hydraulic support lowering pillar and moving frame on the working face is quantitatively analysed at different inlet wind velocities of 2.5 to 3.0 m/s to determine the optimum wind velocity for dust suppression on the working face. The optimum wind speed for dust suppression is 2.6 m/s. This study lays a foundation for the ventilation design and dust control in the early stage of a mine and for the establishment of a clean and green production mine.

通风除尘是一种常用的粉尘控制策略。本研究通过数值模拟实验，分析了综放工作面不同入口风速下的气流输送和粉尘污染特征，得到了最佳抑尘风速。当入口风速在 0.5～3.0 m/s 范围内波动时，工作面总体粉尘质量浓度先增加后保持稳定，但在 2.5～3.0 m/s 范围内，总体变化工作面呼吸区粉尘质量浓度和粉尘质量浓度不显着。在2.5～3.0 m/s的不同入口风速下，定量分析工作面液压支架下立柱和移动架产生的呼吸区粉尘污染，确定工作面抑尘的最佳风速。抑尘的最佳风速为2.6 m/s。本研究为矿山前期的通风设计和粉尘控制，为建设清洁绿色生产矿山奠定了基础。