The Effects of Internal Erosion on the Physical and Mechanical Properties of Tailings under Heavy Rainfall Infiltration
The stability of tailings dam will be affected by the internal erosion under unsteady seepage caused by heavy rainfall infiltration which changes the physical and mechanical properties of tailings. In this paper, the hydraulic sedimentary model was established to investigate the effects of dry beach...
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MDPI AG
2021-10-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/20/9496 |
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| author | Rong Gui Guicheng He |
| author_facet | Rong Gui Guicheng He |
| author_sort | Rong Gui |
| collection | DOAJ |
| description | The stability of tailings dam will be affected by the internal erosion under unsteady seepage caused by heavy rainfall infiltration which changes the physical and mechanical properties of tailings. In this paper, the hydraulic sedimentary model was established to investigate the effects of dry beach slope on the sedimentary characteristics of tailings in upstream tailings dam, and the results indicated that the dry beach with a larger slope has a more obvious stratification of tailings. Additionally, the sand column model was built to investigate the effects of internal erosion on the physical and mechanical properties of sedimentary tailings under unsteady seepage, and the results indicated that the migration of fine-grained tailings was caused by internal erosion increases the permeability and reduces the shear strength of the tailings. After internal erosion of tailings under heavy rainfall in 50 years return period for 24 h, the average particle size of downstream tailings (sample DT), midstream tailings (sample MT), and upstream tailings (sample UT) increased by 6.4%, 12.0%, and 2.4%, respectively, the hydraulic conductivity of the samples DT, MT, and UT increased by 27.2%, 17.9%, and 15.3%, respectively, and the shear strength of each samples decreased by 20.9%, 15.1%, and 12.4%, respectively. |
| first_indexed | 2024-03-10T06:45:53Z |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T06:45:53Z |
| publishDate | 2021-10-01 |
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| spelling | doaj.art-fc8d55c4b3f24f0795e15b52cc6e6d5b2023-11-22T17:19:32ZengMDPI AGApplied Sciences2076-34172021-10-011120949610.3390/app11209496The Effects of Internal Erosion on the Physical and Mechanical Properties of Tailings under Heavy Rainfall InfiltrationRong Gui0Guicheng He1School of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, ChinaSchool of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, ChinaThe stability of tailings dam will be affected by the internal erosion under unsteady seepage caused by heavy rainfall infiltration which changes the physical and mechanical properties of tailings. In this paper, the hydraulic sedimentary model was established to investigate the effects of dry beach slope on the sedimentary characteristics of tailings in upstream tailings dam, and the results indicated that the dry beach with a larger slope has a more obvious stratification of tailings. Additionally, the sand column model was built to investigate the effects of internal erosion on the physical and mechanical properties of sedimentary tailings under unsteady seepage, and the results indicated that the migration of fine-grained tailings was caused by internal erosion increases the permeability and reduces the shear strength of the tailings. After internal erosion of tailings under heavy rainfall in 50 years return period for 24 h, the average particle size of downstream tailings (sample DT), midstream tailings (sample MT), and upstream tailings (sample UT) increased by 6.4%, 12.0%, and 2.4%, respectively, the hydraulic conductivity of the samples DT, MT, and UT increased by 27.2%, 17.9%, and 15.3%, respectively, and the shear strength of each samples decreased by 20.9%, 15.1%, and 12.4%, respectively.https://www.mdpi.com/2076-3417/11/20/9496upstream tailings damsedimentary characteristicsunsteady seepageinternal erosionparticle size distributionhydraulic conductivity |
| spellingShingle | Rong Gui Guicheng He The Effects of Internal Erosion on the Physical and Mechanical Properties of Tailings under Heavy Rainfall Infiltration Applied Sciences upstream tailings dam sedimentary characteristics unsteady seepage internal erosion particle size distribution hydraulic conductivity |
| title | The Effects of Internal Erosion on the Physical and Mechanical Properties of Tailings under Heavy Rainfall Infiltration |
| title_full | The Effects of Internal Erosion on the Physical and Mechanical Properties of Tailings under Heavy Rainfall Infiltration |
| title_fullStr | The Effects of Internal Erosion on the Physical and Mechanical Properties of Tailings under Heavy Rainfall Infiltration |
| title_full_unstemmed | The Effects of Internal Erosion on the Physical and Mechanical Properties of Tailings under Heavy Rainfall Infiltration |
| title_short | The Effects of Internal Erosion on the Physical and Mechanical Properties of Tailings under Heavy Rainfall Infiltration |
| title_sort | effects of internal erosion on the physical and mechanical properties of tailings under heavy rainfall infiltration |
| topic | upstream tailings dam sedimentary characteristics unsteady seepage internal erosion particle size distribution hydraulic conductivity |
| url | https://www.mdpi.com/2076-3417/11/20/9496 |
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