Abstract：
The present tunnel ventilation modes were analyzed and the law of dust transmitting after blasting was described based on the measured data. The pollution sources and the problems relative to air purification technology were presented. And the new tunnel ventilation technology of forced-out air curtain is put forward. By way of numerical simulation, the effects of forced-in ventilation and forced-out air curtain ventilation are compared. The results show that the forced-out air curtain ventilation can reduce the dust and smoke during tunnel construction, improving the working environment of tunnel.
2013, Vol. 50 