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Zhang H, Shen Z, Liu D, Xu L, Gan L, Long Y. A Suggested Equivalent Method for a Drainage Structure to Analyze Seepage in Tailings Dam. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7154. [PMID: 36295221 PMCID: PMC9605340 DOI: 10.3390/ma15207154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/01/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
To better understand the seepage field in tailings dam with a drainage structure that combines drainage mat, drainage tube, and geotextile, an equivalent seepage analysis method for the drainage structure is presented. In the method, an equivalent drainage structure is suggested to replace the original drainage. It has enough size to be easily presented in the three-dimensional (3d) model of a tailings dam. According to a back analysis procedure using the quasi-3d models of a tailings dam with original and equivalent drainage structures, the material properties of the equivalent drainage structure can be obtained under the principle of drainage capacity equivalence. It is demonstrated that the suggested method is accurate enough to capture the seepage field in a tailings dam based on comparing the calculated and measured phreatic lines in a tailings dam for verification. Then, the method is employed to investigate the seepage field in a tailings dam in China for a case study. The rise of water level, damage of drainage structure, or increase of tailings discharge speed and time will lift up phreatic line. After terminating tailings discharge, phreatic line will first rise and then fall. The effect of tailings discharge on phreatic line will almost disappear after terminating tailings discharge for 24 h.
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Affiliation(s)
- Hongwei Zhang
- College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
| | - Zhenzhong Shen
- College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
| | - Detan Liu
- College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
- Datang Hydropower Science & Technology Research Institute Co., Ltd., Nanning 530007, China
| | - Liqun Xu
- College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
| | - Lei Gan
- College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
| | - Yifei Long
- College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
- POWERCHINA Guiyang Engineering Croporation Limited, Guiyang 550081, China
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