新疆某煤制气矿井氡析出的辐射环境影响研究

Study on Radiation Environmental Impact on Radon Exhalation of A Large Coal Mine in Xinjiang

为了了解某矿井氡析出对周围环境的影响,通过对矿井井上、井下环境氡浓度调查与测量,运用计算公式和UAIR-FINE软件,估算工作人员年附加受照剂量,模拟氡排放对周围20 km范围内各子区的氡浓度贡献值分布、公众个人剂量分布。结果表明,矿井生活环境氡浓度基本处于环境本底和限值以内,井下部分区域氡浓度略高,需采取补救行动;工作人员年附加受照剂量基本处于全国煤矿地下工作人员平均剂量水平;煤田矿井氡排放对周围20 km范围内公众的影响可以忽略。

In order to study the effect of a certain mine radon exhalation on the surrounding environment, based on radon con-centration investigation and measurement of the living environment of a large coal mine, the additional radiation dose that coal mine workers suffered was calculated using dose calculation formula and UAIR-FINE software. The distribution of radon concen-tration value and the public individual dose 20 km around caused by emitting radon was simulated. Results show that the radon concentration level of living environment of coal mine area is basically within the level of environmental background and within the limit value of national standard. The radon concentration of underground work environment area was slightly high that need to take remedial action. Additional effective dose of staff working underground was basically according with the mean dose of the national underground coal miner. Coal mine radon emission of around 20 km within the scope of influence of the public could be ignored.