Abstract: In mine ventilation system,the large wind speed to determine the return air shaft section but ignore the ventilation energy consumption.So,the computational formula between ventilation economic section and the parameters of air volume and ventilation time from the perspective of lining,maintenance and electricity costs of the return air shaft.Taking a mine as an example,the ventilation economic section is computed by the formula based on the basic datas of air volume of return air shaft,tunneling lining and electricity so as to optimize the investment cost during the construction and operation of return air shaft.The return air shaft acreage is obtained by economic analyzing the results of the computational formula and the original design acreage.

Key words: Ventilation economic section, Optimize computation, Construction period, Operation period