Numerical Investigation of Saturated-Unsaturated Flow and Stability Analysis of Tailings Dams Considering the Influence of Saline Solutions
A tailings dam is normally constructed through self-consolidation with minimum compaction effort. Accordingly, special attention to the ultimate limit design in assessing the tailings dam instability condition is of primary importance. Furthermore, the existence of pore fluid chemical contaminants w...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_16008.pdf |
| _version_ | 1797835414959030272 |
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| author | Anbarestani Mona Sadeghi Hamed Darzi Ali Golaghaei |
| author_facet | Anbarestani Mona Sadeghi Hamed Darzi Ali Golaghaei |
| author_sort | Anbarestani Mona |
| collection | DOAJ |
| description | A tailings dam is normally constructed through self-consolidation with minimum compaction effort. Accordingly, special attention to the ultimate limit design in assessing the tailings dam instability condition is of primary importance. Furthermore, the existence of pore fluid chemical contaminants with high concentrations makes soil hydraulic and shear resistance properties subject to considerable changes.Therefore, this study aims to investigate the stability of a tailing dam using saturated-unsaturated flow analysis under 0.2 and 0.6 M sodium chloride solutions and pure water as a benchmark. To make the analyses as realistic as possible, recently developed solute-dependent hydraulic conductivity and water retention models are embedded into the numerical software. The results show that the saline-based model has higher pore water pressure than the pure water model due to more rainfall penetration by increasing the pore fluid salt concentration. Furthermore, increasing salt solution concentration enhances the tailing dam's drainagecondition, which leads to an increase in the dam's shear strength and, consequently, the factor of safety. Therefore, the stability of the tailings dam is improved by the combined impact of salt on both the flow and strength. |
| first_indexed | 2024-04-09T14:52:31Z |
| format | Article |
| id | doaj.art-d661f133ad3746109f3408aa191efe87 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-04-09T14:52:31Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-d661f133ad3746109f3408aa191efe872023-05-02T09:28:10ZengEDP SciencesE3S Web of Conferences2267-12422023-01-013821600810.1051/e3sconf/202338216008e3sconf_unsat2023_16008Numerical Investigation of Saturated-Unsaturated Flow and Stability Analysis of Tailings Dams Considering the Influence of Saline SolutionsAnbarestani Mona0Sadeghi Hamed1Darzi Ali Golaghaei2Department of Civil Engineering, Sharif University of TechnologyDepartment of Civil Engineering, Sharif University of TechnologyDepartment of Civil Engineering, Sharif University of TechnologyA tailings dam is normally constructed through self-consolidation with minimum compaction effort. Accordingly, special attention to the ultimate limit design in assessing the tailings dam instability condition is of primary importance. Furthermore, the existence of pore fluid chemical contaminants with high concentrations makes soil hydraulic and shear resistance properties subject to considerable changes.Therefore, this study aims to investigate the stability of a tailing dam using saturated-unsaturated flow analysis under 0.2 and 0.6 M sodium chloride solutions and pure water as a benchmark. To make the analyses as realistic as possible, recently developed solute-dependent hydraulic conductivity and water retention models are embedded into the numerical software. The results show that the saline-based model has higher pore water pressure than the pure water model due to more rainfall penetration by increasing the pore fluid salt concentration. Furthermore, increasing salt solution concentration enhances the tailing dam's drainagecondition, which leads to an increase in the dam's shear strength and, consequently, the factor of safety. Therefore, the stability of the tailings dam is improved by the combined impact of salt on both the flow and strength.https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_16008.pdf |
| spellingShingle | Anbarestani Mona Sadeghi Hamed Darzi Ali Golaghaei Numerical Investigation of Saturated-Unsaturated Flow and Stability Analysis of Tailings Dams Considering the Influence of Saline Solutions E3S Web of Conferences |
| title | Numerical Investigation of Saturated-Unsaturated Flow and Stability Analysis of Tailings Dams Considering the Influence of Saline Solutions |
| title_full | Numerical Investigation of Saturated-Unsaturated Flow and Stability Analysis of Tailings Dams Considering the Influence of Saline Solutions |
| title_fullStr | Numerical Investigation of Saturated-Unsaturated Flow and Stability Analysis of Tailings Dams Considering the Influence of Saline Solutions |
| title_full_unstemmed | Numerical Investigation of Saturated-Unsaturated Flow and Stability Analysis of Tailings Dams Considering the Influence of Saline Solutions |
| title_short | Numerical Investigation of Saturated-Unsaturated Flow and Stability Analysis of Tailings Dams Considering the Influence of Saline Solutions |
| title_sort | numerical investigation of saturated unsaturated flow and stability analysis of tailings dams considering the influence of saline solutions |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_16008.pdf |
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