无轨开采铀矿井通风降氡技术分析与对策

Analysis and Strategy of Technique for Ventilation and Radon Reduction in Trackless Mining Uranium Mines

对无轨采矿铀矿井通风系统现状开展调查后发现,无轨开采铀矿井通风氡污染的主要原因是斜坡道将通风系统变为角联系统,导致通风系统稳定性差、污风串联、入风污染,使井下工作场所氡活度浓度及氡子体α潜能浓度超过国家标准。针对上述问题,结合某铀矿井通风系统整改实例,从通风系统设计、生产管理和通风管理等方面提出了无轨采矿法的设计与管理原则。

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 prob- lem 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.