Abstract：In view of the tunnel fire of solo-ended mine lane under pressure into ventilation mode, it is obtained critical velocity and critical ventilation quantity formula through theory analysis when solo-ended mine lane is fire hazard. It is adopted FDS to simulate smoke rollback distance, contra-flow velocity and critical ventilation quantity when there are different fire source location and fire source power. The simulation results show that the smoke rollback extent and critical ventilation quantity are increased at first and then decreased when the fire work lane horizontal distance increases. Compared with the calculation and simulation results, it is verified formula reliability, and it is shown the significant correlation through the correlation coefficient test.

Keyword：solo-ended mine lane;critical velocity;critical ventilation quantity;