Abstract: The mine ventilation system relies on the development system to serve production operations,and has the dual attributes of stability and dynamics.Ventilation system optimization not only depends on its own way of development,but is also closely related to its associated ventilation system.Aiming at the special period of the construction period of the mine during the construction period,the ventilation roadway is gradually improved,the system lacks throughair flow,and serious pollution and wind are connected in series.Researches on the optimization and application of the ventilation system during the infrastructure period are carried out.Taking the Dahongshan Iron Mine Erdaohe mining area as the engineering background,the Ventsim ventilation simulation software was used to establish a digital model of the ventilation system.The roadway database was established by collecting field parameters from the field measurements.The results of the scheme,simulation system establishment,parameter determination and fan performance measurement mutually verify its scientificity and feasibility.

Key words: Infrastructure ventilation, Roadway parameters, Numerical Simulation, Ventsim software