山东省煤矿氡浓度水平调查与评价

Investigation and Evaluation of Radon Concentrations in Coal Mines in Shandong Province

对选取的22个不同类型的山东省煤矿井下氡浓度、γ辐射剂量率及煤中放射性核素含量进行了调查与测量,估算了井下矿工受到的辐射剂量。结果表明,山东省国有大中型煤矿井下氡浓度、γ辐射剂量率、井下矿工人年均有效剂量分别为(48.53±45.87)Bq/m3、(0.199±0.017)μGy/h、0.571 mSv;地方中小型煤矿分别为(63.97±89.18)Bq/m3、(0.144±0.026)μGy/h、0.601 mSv。以上结果表明,山东省煤矿井下氡浓度、γ辐射水平均处于较低水平。

Investigation and measurement were carried out of the radon concentrations, γ radiation dose rate and naturally occurring radionuclides in coal in the selected 22 different types of coal mines in Shandong Province,together with estimating the radiation dose to the underground miners. The measured data shows that the radon concentration, γ radiation dose rate and annual effective dose to the underground miners were （48.53±45.87）Bq/m^3, （0. 199±0.017） μGy/h and 0.571 mSv in the state-owned large and medium-sized coal mines, 63.97±89.18）Bq/m^3, （0.144±0. 026） μGy/h and 0. 601 mSv in local small and medium-sized coal mines. These results show that the level of radon concentration and T radiation dose in coal mines in Shandong Province are low.