Theoretical and Case Studies of Interval Nonprobabilistic Reliability for Tailing Dam Stability

Dong, Longjun; Sun, Daoyuan; Li, Xibing

doi:10.1155/2017/8745894

Cited by 19 publications

(11 citation statements)

References 24 publications

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“…According to the relevant literature, the position of the phreatic line affects the stability of the dam slope [51,72,73]. e tailings below the phreatic line have a slow consolidation speed, and the nearly saturated tailings increase the weight of the dam, reducing its shear strength and effective stress.…”

Section: Seepage (Seepage Field Directly Induces Instability Of Tailimentioning

confidence: 99%

A Comprehensive Review on Reasons for Tailings Dam Failures Based on Case History

Lyu

Jaturapitakkul

et al. 2019

Advances in Civil Engineering

147

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On a global scale, the demand for mineral products has increased substantially with economic development. Consequently, the mining of mineral resources results in the production and accumulation of a large number of tailings, causing many problems with respect to mining, the environment, and the economy. In the mining process, tailings must be reasonably treated to prevent them from entering the water cycle through rivers. The storage of tailings under water can effectively hinder the chemical reactions that they undergo. Therefore, it is a critical practice to store these substances in ponds or impoundments behind dams. However, tailings dams frequently fail, resulting in the discharge of significant quantities of tailings into the natural environment, thereby causing grievous casualties and serious economic losses. This paper discusses reasons including seepage, foundation failure, overtopping, and earthquake for tailings dam failures and explores failure mechanisms by referring to the available literature. This research has determined that the failure of tailings dams is closely related to the state of the country’s economy. Most of the tailings dam breakages in developed countries occurred decades ago. In recent years, the proportion of tailings dam failures in developing countries has been relatively high. Considering the serious damages caused by tailings dam breakage, it is important to understand the main reasons and mechanisms for their failure. The purpose of this review is to provide a reference for the design and construction to the building of the tailing dams and to reduce the occurrences of their failure.

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Section: Seepage (Seepage Field Directly Induces Instability Of Tailimentioning

confidence: 99%

A Comprehensive Review on Reasons for Tailings Dam Failures Based on Case History

Lyu

Jaturapitakkul

et al. 2019

Advances in Civil Engineering

147

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“…Affected by rainfall infiltration, tailings recycling water, dry beach face evaporation, and other factors, the position of the phreatic line in the tailings pond suffers in various ways in the DW cycles [1,17,18]. Therefore, in the numerical analysis mode, the determination of the position of the phreatic line under DW cycles plays an important role [19][20][21][22][23][24][25][26][27]. Figure 4 shows the diagram for calculating the tailings dam's phreatic line.…”

Section: Methods For Calculating the Tailings Dam's Phreatic Line Undementioning

confidence: 99%

The Stability of Tailings Dams under Dry-Wet Cycles: A Case Study in Luonan, China

Wang

Zhan

Wang

et al. 2018

Water

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Instability of tailings dams may result in loss of life and property and serious environmental pollution. The position of the tailings dam's phreatic line varies due to continuously changing factors such as rainfall infiltration and discharge of tailings recycling water. Consequently, tailings dams undergo dry-wet (DW) cycles, accompanied by the appearance of a hydro-fluctuation belt. With dynamic development of the physical and chemical properties of tailings sand in the hydro-fluctuation belt, the stability of tailings dams is uncertain. In this study, direct shear tests were performed on the tailings sand collected from a tailings dam in Luonan, through which the shear strength parameters of tailings sand with DW cycles were obtained. Then, a method that efficiently calculates the phreatic line of the tailings dam under DW cycles was proposed. In addition, based on laboratory tests and the proposed phreatic line calculation method, we used a finite element program to evaluate the stability of the tailings dam that experienced different DW cycles. The calculated results showed that: (i) the damage effects of DW cycles gradually weakens as the number of DW cycles increases.(ii) With the increasing of DW cycles, the maximum displacement of the tailings dam increases from 0.5 mm to 22 mm, and the area of maximum displacement expanded mainly at the toe of the tailings dam and at the front edge of the hydro-fluctuation belt. (iii) The tailings dam safety factor decreases continuously with increasing DW cycles. This study may provide a novel method for analyzing the stability of tailings dams under different DW cycles as well as an important reference for improving tailings dam stability.

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“…Apart from the increase in the height of the structure itself, it is necessary to take into account the non-stationary state of filtration, in particular, pore pressure distribution within the sediments themselves, as well as the dam body and the subsoil (Jiang & Tang, 2015;Li et al, 2009;Sitharam & Hegde, 2017). Stability is affected by the pore pressure (Martin & McRoberts, 1999), in particular, the water table localization (Dong et al, 2017;Tang et al, 2016;Yin et al, 2011). It is also very important to correctly determine the parameters of waste and substrate, which constitute input data for the stability verification calculations.…”

Section: Introductionmentioning

confidence: 99%

Safety analysis of the Żelazny Most tailings pond: qualitative evaluation of the preventive measures effectiveness

Łydżba

Różański

Sobótka

et al. 2021

Studia Geotechnica Et Mechanica

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In this paper, a qualitative safety analysis of the Żelazny Most tailings pond is addressed. This object is one of the largest facilities of this type in the world being a crucial element in the technological line of copper production in KGHM Polska Miedź S.A. The assessment of the effectiveness of two types of preventive measures, i.e., relief wells and loading berms, is investigated based on displacement and stability analysis of two 2D cross-sections in a technical section of the dam. The study shows that the considered preventive measures generally have a positive impact on increasing the safety level of the structure during its further raise. In particular, their effectiveness is most evident when they are applied simultaneously. It is eventually suggested that the selection of final solutions to be applied on the facility should be based on the quantitative 3D analysis.

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Theoretical and Case Studies of Interval Nonprobabilistic Reliability for Tailing Dam Stability

Cited by 19 publications

References 24 publications

A Comprehensive Review on Reasons for Tailings Dam Failures Based on Case History

A Comprehensive Review on Reasons for Tailings Dam Failures Based on Case History

The Stability of Tailings Dams under Dry-Wet Cycles: A Case Study in Luonan, China

Safety analysis of the Żelazny Most tailings pond: qualitative evaluation of the preventive measures effectiveness

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