2022 Volume 78 Issue 1 Pages 13-25
In this study, simulation using unsteady 3-D CFD (Computational Fluid Dynamics) analysis was conducted to understand the high dust concentration area in the tunnel and the change of dust concentration chronological change in the ventilation design phase before tunnel construction. As a result, it was found that it was possible to predict the concentration of dust in the tunnel chronological change during construction by experimental results or measuring results of field tests conducted by JNIOSH (National Institute of Occupational Safety and Health, Japan), in which tunnel ventilation was conducted using the diffusion-dilution method. Furthermore, by evaluating the dust dispersion chronological change and the arithmetic mean, we were able to confirm the changes in the mine environment due to differences in the ventilation system and ventilation parameters.
