Analysis and strategy of technique for ventilation and radon reduction in trackless mining uranium mines

The investigation on the present situation of uranium mine ventilation system of trackless method shows that the ramp can change the ventilation system into complex diagonal branches which is the main reason that causes radon pollution in the trackless mining uranium ventilation. This problem leads to a poor stability of ventilation system, air pollution and air leaking. As a result, the radon and radon daughter concentrations of underground air are higher than the national standard. Aimed at the existent problems, the design of ventilation system, the production plan and the daily management are discussed in this paper, which is based on a real trackless mining uranium mine. (authors)