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| Geological Guarantee for In-situ Leaching Development of Sandstone-type Uranium: Study on Microscopic Heterogeneity of Ore-bearing Aquifer |
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Received:January 04, 2022
Revised:January 10, 2022
Accepted:January 17, 2022
Published Online:April 12, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.05.017 |
| KeyWord:sandstone type uranium deposit；in-situ leaching；microcosmic；heterogeneity |
| Author | Institution |
| LI Li-yao |
东华理工大学 |
| XIA Fei |
东华理工大学 |
| HUI Hao-hao |
中核内蒙古矿业有限公司 |
| LIU Jin-hui |
东华理工大学 |
| WANG Xiao-wei |
中核内蒙古矿业有限公司 |
| LIU Xiao-fei |
东华理工大学 |
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| Abstract: |
| With the large-scale development of sandstone-type uranium deposits in China, influence of ore-bearing aquifer heterogeneity on in-situ leaching uranium mining gradually appears. In view of ore-bearing aquifer heterogeneity of sandstone-type uranium deposit, the experiment results of core CT scanning, thin section, SEM, and other microscopic analysis were summarized and analyzed. Applying two typical sandstone-type uranium deposits in China as examples, the mineral composition heterogeneity of sandstone-type uranium deposit and its influence on in-situ leaching uranium mining were analyzed from qualitative and quantitative aspects. The results show that Saihan Formation in Erlian Basin is suitable for acid in-situ leaching, the formation cementation is weak, the porosity and permeability are good, which is conducive to full migration of in-situ leaching solution in ore bed. The space of Zhiluo Formation in Ordos Basin is mainly intergranular pores with good connectivity. Due to deep burial, Zhiluo Formation is denser than that of Saihan Formation, and the permeability is worse than that of Saihan Formation. Finally, the limitations of heterogeneity analysis brought from microscopic experimental methods were summarized, and the macroscopic heterogeneity analysis methods were prospected. |
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