Abstract: Based on layout characteristics of tunnel of metal mine and fractional characteristic of air flow after catastrophe, mathematic model of multi-components wind flow was established by adopted k-ε two-equation model, numerical simulation was done on multi-components wind flow after catastrophe of ramp by using hybrid scheme and SIMPLE algorithm based on collocated grid.Simulation results indicate that volume fractions of contamination in simulative tunnel length range are greater than national standards, while it seriously affects safe production of mine; influences range of ramp catastrophe at downwind side of crossheading was large than upwind side catastrophe's, influences of middle plate crossheading fire to working surface was most serious, high concentration pollutants spread to the whole working surface, which is key precaution area of fire prevention; influences of air flow to catastrophe are big, air flow control at catastrophe period is the important direction of fire control of metal mine.

Key words: Metal mine, Fire disaster, Air flow, Numerical simulation