This research applied two suppression technologies of atomizing dust suppression (ADS) and spraying dust suppression (SDS) to eliminate fugitive dust emitted from coal stockpiles and further investigated their optimal operating parameters. In field tests, the mass concentrations of TSP, PM₁₀, and PM_2.5 were simultaneously measured at both upwind and downwind sites of a simulated coal stockpile to determine the suppression efficiency of fugitive dust. High concentrations of fugitive dust were observed under a strong wind speed of 10 m/s, particularly for particle sizes larger than 7 μm. Overall, the suppression efficiencies of fugitive dust by ADS (75.50–88.17 %) were always higher than those by SDS (70.70–84.50 %). Fine mist atomized by ADS covered a wider surface area of the coal stockpiles and captured more dust in the air than SDS. The suppression efficiencies of fugitive dust for intermittent watering (82.81 %) were higher than those for continuous watering (77.75 %). Intermittent watering could maintain a protective moisture layer over the entire surface of coal stockpiles, thus extending the drying time of moisture from the coal stockpiles. The optimal operating parameter for ADS was intermittent atomizing at an angle of 30°, while that for SDS was intermittent spraying at an angle of 45°.

本研究应用雾化抑尘（ADS）和喷雾抑尘（SDS）两种抑尘技术，消除煤堆中的扬尘，并进一步研究了它们的最佳运行参数。在现场测试中，TSP、PM ₁₀和 PM _2.5的质量浓度在模拟煤堆的上风处和下风处同时测量，以确定扬尘的抑制效率。在 10 m/s 的强风速下观察到高浓度的扬尘，特别是对于大于 7 μm 的粒径。总体而言，ADS（75.50-88.17%）的扬尘抑制效率始终高于SDS（70.70-84.50%）。与 SDS 相比，ADS 雾化的细雾覆盖了煤堆的更大表面积，并在空气中捕获了更多的灰尘。间歇浇水对扬尘的抑制效率（82.81%）高于连续浇水（77.75%）。间歇性浇水可以在煤堆的整个表面保持一层保护性的水分层，从而延长了煤堆中水分的干燥时间。ADS的最佳操作参数是在30°的角度间歇雾化，而SDS的最佳操作参数是在45°的角度间歇喷雾。