Abstract: To reduce harm of fine dust and realize effective control and prevention of dust on the operation site, experiments were carried out in rectangle and arch simulation roadways. The grid point distribution method was adopted to lay out the testing points and the method of adjusting the wind speed was adopted. Besides, a numerical simulation analysis was carried out by virtue of Gambit modeling and Fluent. The result indicates that when the dust source sprays dust at a speed of 10 mg/s, the dust particles disperse freely and the dust concentration on the axis of the roadway is less than that on the edge of the wall surface, when the wind speed is l m/s, the concentration on the axis and that on the edge of the surface are generally the same, when the dust particles disperse freely, the viscous effect of the roadway wall dominates the dispersion and distribution of dust and the wind speed is the main factor affecting the floating status of the fine dust, and that the ways of reducing the concentration of the fine dust in the roadway mainly include reasonable design of wind speed in the environment, improvement of the smoothness of the wall surface of the roadway and reduction of the viscous effect of the wall surface for the fine dust.

Key words: roadway sections, wind speed, two-phrase flow of gas and solid, numerical simulation, fine dust distribution