A particle-packing emanation media consists of ore particles with varying size and shape commonly existing in the stopes and the blind roadways of underground uranium mines, from which exhaled radon poses a health hazard to mining personnel. Dynamic equations of radon release-diffusion-seepage migration in finite-thickness particle-packing emanation media were established in this study based on the individual ore model. Calculation equations for radon exhalation rate and proportion of the media under two different kinds of migration mechanisms (drived by seepage-diffusion or only by seepage) w...
