The concentration distribution and settlement regularity of 10μm particles at the beach face of tailing impoundment under the wind speed of 0. 5,1,2 and 4 m/s were studied by using the numerical method. The results show that the particle concentration was constantly decreasing with the increases of the wind speed and migration distance at the downwind direction. When the wind speed was 0. 5 m/s at the downwind direction, the local particle concentration at the beach face of the tailing impoundment was relatively high and the particles deposited within 2 000 m of the downwind direction. When the wind speed increased to 4. 0 m/s, the particles were taken away by the wind, deposited within 1 000 m of the downwind direction and its concentration would fall rapidly. At the direction perpendicular to the wind direction, the wind speed has a small influence on the particle concentration distribution, the most of the particles deposited within the 100 m around the tailing impoundment, and the concentration of local area was higher. According to the influence of cumulative effect of particles of tailing impoundment on the surrounding environment, the protective measures were discussed.%采用数值方法研究粒径为10μm的尾矿库滩面颗粒,在风速分别为0.5、1、2和4 m/s时的浓度分布和沉降规律.模拟结果表明,随着风速和迁移距离的增大,颗粒浓度不断降低.顺风方向上,风速为0.5 m/s时,尾矿库滩面颗粒在下风向局部浓度较高；风速增大至4.0 m/s时,粒子被水平风大量带走,下风向颗粒浓度迅速降低.非顺风方向上,风速对颗粒物浓度分布的影响较小,大部分颗粒沉积在尾矿库周边较小范围内,局部区域浓度较高.针对尾矿库颗粒的累积效应对周边环境的影响,简述了有关尾矿库颗粒对周边环境污染的防护措施.
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