Numerical research on the airflow distribution in mine tunnels
Résumé
Based on the 3D model of typical tunnels in mines, the air flow structure in the three hearts arch-section tunnel was investigated and the influence of ventilation velocity and cross section size on air flow distribution in tunnels was studied and the average velocity points were analyzed quantitatively. The results showed that the air flow structure showed circular distribution which is similar with the shape of three hearts arch-section under different ventilation velocities and cross section sizes, . The shape of the cross section and the tunnel wall were the critical factors influencing the air flow structure. And the average velocity points were mainly closed to the tunnel wall. The characteristic equations were then developed to describe the average velocity distribution, which provide the theoretical basis for accurately measuring the average velocity in mine tunnels.Références
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