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| Spatial-temporal Evolution of Porosity during In-situ Acid Leaching of Uranium Based on Numerical Simulation |
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Received:December 20, 2018
Revised:December 24, 2018
Accepted:December 26, 2018
Published Online:March 19, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.04.007 |
| KeyWord:in-situ uranium mining; chemical precipitation; porosity; permeability; porous medium |
| Author | Institution |
| chenjingming |
东华理工大学水资源与环境工程学院 |
| lixun |
东华理工大学水资源与环境工程学院 |
| luoyue |
东华理工大学水资源与环境工程学院;东华理工大学核资源与环境重点实验室 |
| pengzhijuan |
东华理工大学水资源与环境工程学院 |
| zhouzechao |
东华理工大学水资源与环境工程学院 |
| chenqianqian |
东华理工大学水资源与环境工程学院 |
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| Abstract: |
| Chemical precipitation often occurs during in-situ uranium mining, which affects uranium leaching efficiency. In order to illustrate time and position law of chemical precipitation, spatiotemporal evolution of ore-bearing porosity was numerically simulated under the same conditions of leaching solution. The simulation results show that the 0-5 day simulation zone has porosity-permeability enlargement (chemical dissolution) from 2.6-20 m to injection hole; after the fifth day, the entire simulation zone appears as varying degrees of porosity-permeability reduction (chemical precipitation). When the model was run to the set maximum time (550 days), porosity of model droped by 25.7% in immediate vicinity of injection hole; while porosity of model droped by 15.13% near pumping hole. |
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