湖北当阳铅锌伴生放射性矿污染调查与评估

The survey and assessment of lead and zinc associated radioactive minerals in Dangyang of Hubei Province

为了掌握湖北当阳铅锌伴生放射性矿的辐射环境现状，在2009年5月至2011年7月期间，使用各种辐射监测仪器对该矿山的工作场所和生活区进行了氡及其子体浓度、空气γ吸收剂量率、各种介质中天然放射性核素含量的测定。结果表明，坑道内氡气浓度、空气γ吸收剂量率以及各种环境介质中天然放射性核素含量分别为当地本底水平的179倍、12．3倍以及13～43．6倍；坑道内氡析1出率为对照点的42．5倍。矿区职业人员及公众的年有效剂量均超过国家标准限值，应当采取必要的辐射管理措施对自然环境和工作人员加以保护。

In order to grasp Hubei Dangyang lead-zinc mine in radiation associated radioactive state of the envi- ronment, during May 2009-July 2011 period, the research group uses a variety of radiation monitoring instruments for the mines in the workplace and living area to survey radon and its daughter concentration, air γ dose rate of natural radionuclides in a variety of media content. The results showed that the trenches radon concentration, air γ dose rate and a variety of natural radionuclide in environmental media content for local background levels were 179 times, 12.3 times and 13-43.6 times; trenches radon exhalation rate control point 42.5 times. Mining pro- fessionals and the public, annual effective dose limits should be conducted exceeded national standards The neces- sary measures radiation management should be conducted and staff of the natural environment need to be protec- ted.