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自然界中铀的分布极广,一切含铀的矿物和土壤,都能析出氡,所以在地下开采的非铀矿山和地下工程中,也有可能出现防氡的问题,为了保障广大职工身体健康和生命安全,必须将井下空气中的氡及其子体浓度降到放射防护规定的允许标准以下。放射防护规定:井下工作面空气中氡的最大允许浓度为1×10~(-10)居里/升,按“潜能值”表示氡子体最大允计浓度分4×10~4兆电子伏/升。经验证明,搞好矿井通风,是排氡、降低氡子体的主要有效手段。
In nature, the distribution of uranium is very wide, and all uranium-bearing minerals and soils can precipitate radon. Therefore, in underground mining of non-uranium mines and underground works, the problem of anti-radon may also occur. In order to ensure the health and life of the general staff and workers Safety, the concentration of radon and its daughters in the downhole air must be reduced below the permissible standards for radiological protection. Radiation protection requirements: the maximum allowable concentration of radon in the air below the surface of the workplace 1 × 10 ~ (-10) Curie / liter, according to “potential value” means that the maximum allowable concentration of radon progeny points 4 × 10 ~ 4 MeV /Rise. Experience shows that to improve well ventilation is the main effective means of radon emission reducing radon progeny.