Abstract: Survey of ventilation resistance of Yanbei Coal Mine was done based on air-gauge base point mensuration and the evaluated error was less than 5%, meanwhile, optimization of parameters of residual leveling was done by adopted visual mine ventilation network solution software which based on WINDOWS, to improve reliability of parameters, provided scientific basis for ventilation network optimization after later mine mining.Results showed ventilation difficult degree of Yanbei mine was easy; but ventilation system of mine was considered at subhealth state based on analysis and evaluation of practical overall ventilation state. Analysis was done on problems existing in mine ventilation system and corresponding countermeasures were proposed.

Key words: Ventilation resistance, Equivalent orifice, Ventilation network optimization