Ventilation Control in Case of Underground Fire.

In case of underground fire, the ventilation is disturbed by the hot smoke columns progressing in the vertical or inclined shafts. The Budryk theory exposes qualitatively the intervention modes allowing the limitation of the aero-motive effect of the fire, or even to stabilize the air supply. A method, making use of computer programs, is proposed which completes the rules of the Budryk theory with quantitative results and makes up for it in complex cases when it cannot be applied.