Investigation on radiation level in certain coal mines in Xinjiang and dose analysis of employees

Abstract

Objective To understand the distribution of associated radioactivity, though investigating and analyzing the level of environmental radioactivity in certain coal mines in Xinjiang, and estimate the effective dose received by the workers.

Methods Taking coal mining activities in a certain area of Xinjiang Province as the object of the study, the environmental radioactivity level in the mining process was obtained through on-site measurement and sampling analysis, and the exposure dose of the workers in the coal mining process was evaluated accordingly.

Results The radiation dose rate and radon concentration in the underground environment of most coal mines in this area are high. The content of radionuclides in gangue of each coal mine is less than 1 Bq/g, the content of radionuclides in most coal samples is less than 1 Bq/g, and the total α and β in the gusher water of each coal mine are lower than the discharge limits of the sewage discharge standards. The radon concentration level in coal mines is an important factor affecting the radiation exposure of workers.

Conclusion Through the investigation of this project, the radioactive level of coal resources stored underground in a certain area is understood, which provides an objective basis for the management and planning of existing coal mines in this area, and provides technical support for the management of exploitation and utilization of mineral resources in China.

Abstract

摘要： 目的 对新疆某地区煤矿开采过程中环境放射性水平进行调查和分析, 了解该地区煤矿中伴生放射性分布情 况, 并估算从业人员所受有效剂量。 方法 以新疆某地区煤矿开采活动为研宄对象, 通过现场测量、采样分析, 获得开 采过程中的环境放射性水平, 并以此为依据评价从业人员在煤矿开采过程中的受照剂量。 结果 该地区部分煤矿井 下环境中丫辐射剂量率及氡浓度偏高;各煤矿的煤矸石中放射性核素含量均小于1 Bq/g, 大部分煤样中放射性核素含 量小于1 Bq/g;各煤矿矿坑涌水中总α、总β含量低于污水排放标准中的排放限值, 煤矿矿井中氡浓度水平是从业人员 辐射影响的重要因素。 结论 通过调查, 了解该地区地下贮存煤炭资源的放射性水平;为该地区现有煤矿的管理和煤 矿规划提供客观依据;为今后我国矿产资源开发利用的管理提供技术支持。