Abstract
It is of great importance to determine the risk grades of the leakage and non-leakage cases of concentrated saltwater from an underground reservoir for the safe operation of reservoirs and environmental protection. In this paper, the model of risk evaluation for environmental pollution of an underground reservoir stored with concentrated saltwater is established. Moreover, the effects of different influencing factors on the risk grades are investigated, along with an uncertainty analysis. In addition, the risk grade of Lingxin Mining Area is calculated, which can contribute to the prevention and control of pollution in the future for that area. The results show that the water quality complexity of mine water is the most significant indicator for risk grade determination. The certainty of weak-risk grade for environmental pollution caused by an underground reservoir when there is no leakage is more than 60% in the Lingxin Mining Area, and the risk grade becomes a strong-risk grade rapidly after concentrated saltwater leakage is considered. This research can provide a theoretical basis for risk control and management of underground reservoirs storing concentrated saltwater.
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This work was supported by Open Fund of Chinese State Key Laboratory of Water Resource Protection and Utilization in Coal Mining with grant number SHJT-16-30.3.
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Hongqing Song designed the entire project and paper. Jianjian Xu and Lianzhi Yang established the model and analyzed the results. Jie Fang and Zhiguo Cao were in charge of underground reservoir construction and provided the real field data. Tianxin Li contributed to the paper writing.
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Yang, L., Xu, J., Fang, J. et al. Risk evaluation of groundwater leakage in coal seam goaf: a case study in the Lingxin Mining Area. Environ Sci Pollut Res 27, 26066–26078 (2020). https://doi.org/10.1007/s11356-020-08995-8
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DOI: https://doi.org/10.1007/s11356-020-08995-8