Analysis of Tunnel Ventilation During Tunnelling - A Case Study

In the case of tunnelling by mining methods, regulations apply to design ventilation. The most important criteria be taken into account when calculating minimum air flow rate in a tunnel are velocity, multiple exchange during one hour, not exceeding permissible concentrations gases and dust, ensuring appropriate climatic conditions. this paper, an analysis ventilation methods is carried out, taking parameters fans ducts. Changing diameter duct line from 1,000 1,400 mm results 3-4-fold reduction fan power. Adding second twin installation reduces power requirement fourfold. Making lines parallel increases about 30-50% compared two installations.