矿井排氡通风,不仅在铀矿山是一个十分重要的问题,在非铀矿山中也是一个应当注意的问题。在改造老矿山的通风系统时,必须特别注意采空区中的氡。在开采年代较久的老矿山,采空区比较多,由于地压的影响,崩坍、陷落的情况比较多,这样的采空区,氡及氡子体极容易积累起来。这时,如果采空区位于进风道上,当进风道相对于采空区处于负压状态时,采空区中的氡就有可能污染进风,使整个矿井空气中氡的浓度升高。采空区中的氡有两个来源。一是由采空 Radon ventilation in mines not only in uranium mines is a very important issue, but also a problem that should be noticed in non-uranium mines. In retrofitting ventilation systems in old mines, special attention must be paid to radon in the goaf. In old mining mines, mined-out areas are relatively large. Due to the influence of ground pressure, there are more collapsing and falling mines, so the radon and radon daughters are likely to accumulate in such goafs. At this time, if the goaf is located in the inlet duct, when the inlet duct is in a negative pressure state relative to the goaf, radon in the goaf may be contaminated into the wind and the concentration of radon in the air of the whole mine shaft may increase . There are two sources of radon in the goaf. First, by goaf