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Experimental study of the damage evolution and radon exhalation characteristics of quasi-uranium ore under constant amplitude cyclic loading and unloading

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Abstract

Cyclic loading damage in uranium mining is often accompanied by changes in radon exhalation characteristics. Understanding the relationship between rock damage and radon exhalation of uranium ore is therefore important for predicting rock instability and improving monitoring methods to ensure the safety of uranium mines and other underground projects. In this study, we performed constant amplitude cyclic loading and unloading tests on quasi-uranium ore to measure the degree of damage and used the closed chamber method to measure the accumulated radon concentration. The results show a range of damage values between 0.089 and 0.315. The sample with the highest damage value also showed the highest radon exhalation rate of 0.0411 ± 0.00384 Bq m− 2 s− 1. We use the dissipated energy as a damage variable and find a positive correlation between damage and radon exhalation rate. The damage value was fitted with radon exhalation rates, yielding correlation coefficients of 0.97, and shows an inverted S-shaped trend. The results provide a basis for monitoring rock stability using radon exhalation in future uranium mining operations.

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Acknowledgements

This research was supported by the Research Foundation of Education Bureau of Hunan Province, China (Grant Nos. 20A422 and 17B228), the National Natural Science Foundation of China (Grant Nos. 11475081 and 11875164), Hunan Provincial Natural Science Foundation of China (Grant No. 2018JJ3427), the Double First Class Construct Program of USC (Grant No. 2019SLY05), Project Approved by Hunan Province Engineering Research Center of Radioactive Control Technology in Uranium Mining and Metallurgy and Hunan Province Engineering Technology Research Center of Uranium Tailings Treatment Technology (Grant No. 2018YKZX1004), Open Fund Project of Hunan Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment (Grant No. 2019KFZ01), Innovation Foundation for Postgraduate Set by University of South China (Grant No. 203YXC006).

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Authors and Affiliations

  1. School of Resource & Environment and Safety Engineering, University of South China, Hengyang, 421001, China

    Fuliang Jiang, Haonan Wu, Jintao Guo, Yong Liu, Zhe Wang, Biao Tan & Caiwo Luo

  2. Hunan Province Engineering Technology Research Center of Uranium Tailings Treatment Technology, Hengyang, 421001, China

    Fuliang Jiang & Yong Liu

  3. Hunan Province Engineering Research Center of Radioactive Control Technology in Uranium Mining, Hengyang, 421001, China

    Fuliang Jiang & Yong Liu

  4. Hengyang City Key Laboratory of Occupational Safety and Health Technology, Hengyang, 421001, China

    Fuliang Jiang

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  1. Fuliang Jiang
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  2. Haonan Wu
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Correspondence to Fuliang Jiang.

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Jiang, F., Wu, H., Guo, J. et al. Experimental study of the damage evolution and radon exhalation characteristics of quasi-uranium ore under constant amplitude cyclic loading and unloading. J Radioanal Nucl Chem 327, 373–384 (2021). https://doi.org/10.1007/s10967-020-07516-8

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  • DOI: https://doi.org/10.1007/s10967-020-07516-8

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