An efficient ventilation system provides underground coal mine with sufficient fresh air, removes dust and hazardous gases, which is the guarantee of the environmental safety in a laneway of coal mines. The airflow dispersion behavior seriously impacts the removal efficiency of dust in the mine network. This paper describes the dynamic characteristics of airflow and dust dispersion regularity based on the computational fluid dynamic (CFD) methods under a typical structure in a laneway of coal mine. First, the model takes the conservation of momentum, turbulent mass and energy into consideration, and the computational domain and obstacles within it are discretized. Second, based on the numerical platform, turbulence model is tested and compared with previous experimental data. Good agreement between experimental studies and model prediction is obtained for k-epsilon model. Furthermore, the steady and transient Discrete Phase Model (DPM) is applied to analyze the dust dispersion and movement under complex air diffusion over time, meanwhile different airflow velocities are investigated. Therefore, the trajectory and concentration of the dust are performed in three-dimensional flow field. The research results indicate that the present work can be meaningful for further understanding of dust movement characteristics with air flow, which could also provide suitable guidance for the ventilation system of emergency rescuing.
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