Mechanical characteristics of non-saturated tailings and dam stability

Zhang, Chao; Liu, Haiming; Yang, Chunhe; Wu, Shangwei

doi:10.1080/17480930.2016.1214405

Cited by 10 publications

(5 citation statements)

References 22 publications

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“…Because of the continuous exploitation of metal minerals and the limited availability of land resources, many tailings ponds have been expanded. The gradually increasing heights and slopes of tailings ponds have induced multiple failures of tailings dams throughout the country, leading to high loss of life, mineral resources, and state property (Li et al, 2015;Zhang et al, 2016). Thus, it is important to establish an effective numerical model that can simulate the unique flow of tailings pond slurry.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation on the Evolution of Tailings Pond Dam Failure Based on GDEM Method

Ming

Zou²,

Wang³

et al. 2022

Front. Earth Sci.

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Because of the continuous exploitation of metal minerals and the limited availability of land resources, many tailings ponds have been expanded. It is of great importance to dynamically calculate the critical parameters of flooding and sand velocity after a collapse, and quickly determine the dangerous area downstream on reducing the hidden dangers for an accident. In view of the limitations of the single finite element and discrete element methods for the simulation of tailings pond instability, the authors use the finite element and discrete element coupling method (GDEM) for the first time to carry out a dynamical process for numerical simulation of the evolution of a tailings pond collapse. The sediment movement and submerged range were compared with the results of the Volume of Fluid (VOF) method. The comparison shows that the change in drainage flow at the dam foundation position and the depth change in the downstream sensitive point after the dam break are consistent with the VOF calculation results, which indicates that the GDEM can be used as an effective means for the analysis of tailings dam failure. The calculation results of this method can provide technical support for the determination of dangerous areas downstream of tailings ponds and the safety management of key areas.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation on the Evolution of Tailings Pond Dam Failure Based on GDEM Method

Ming

Zou²,

Wang³

et al. 2022

Front. Earth Sci.

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“…The advantages and disadvantages of the DSDT schemes, input data quality, and decision making using LCA results will be discussed in this section. (1) Better slope stability and higher tailings discharge piling angle CSDT technology usually uses coarse-grained tailings to build the dam body, especially with the upstream damming method, which exhibits poor stability and can easily liquefy under seismic conditions [39]. In contrast, DSDT technology can avoid dam phreatic seepage damage problems.…”

Section: Discussionmentioning

confidence: 99%

Comparative Life Cycle Assessment of Conventional and Dry Stack Tailings Disposal Schemes: A Case Study in Northern China

et al. 2022

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Alternative tailings disposal technologies can be effective solutions to mining waste safety and environmental problems. The current decision-making processes for tailings disposal schemes lack consideration of environmental impacts. Based on a case study of an open-pit iron mine in northern China, this study adopted the life cycle assessment (LCA) method to compare the environmental impacts of three tailings disposal schemes of conventional slurry disposal technology (CSDT), dry stack disposal technology (DSDT) by belt conveyance and DSDT by truck transport. The results indicated that (1) the environmental impacts of the CSDT scheme were lowest under the premise that water consumption was ignored; (2) the environmental impacts of the DSDT scheme by belt conveyance mainly originated from its transport process, indicating that the tailings storage facilities (TSFs) site planning could be crucial in design decision making; (3) the environmental impacts of the DSDT scheme by truck transport mainly originated from the energy consumption of dry stacking equipment; and (4) the DSDT scheme by truck transport was eventually found to be preferable and implemented in the case study, after comprehensively considering the LCA results, TSF safety and remaining capacity, and social and policy uncertainties. It is therefore recommended to conduct LCA of environmental impacts in the decision-making process for the sustainable design of TSFs.

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“…Wang [24] used simulation software to analyze the long-term stability of tailings ponds, and put forward the basis of dam break of tailings pond under the condition of rainfall [25]. In terms of stability analysis, Sun [26] analyzed the stability of tailings ponds under the coupling action of seepage and stress, and checked the seepage stability with the height of phreatic line as the judgment basis of seepage stability [27][28][29]. Maldonado [30] expressed the uncertainty of tailings parameters in the form of probability, and studied the reliability of tailings ponds.…”

Section: Introductionmentioning

confidence: 99%

Solution and Stability Analysis of Sliding Surface of Tailings Pond under Rainstorm

Jin

et al. 2022

Sustainability

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In the case of rainstorm, instability accidents in tailings ponds occur frequently, but there is no reliable calculation method for the stability calculation of tailings ponds. At the same time, there are problems of fuzzy hydrological boundaries and randomness of geotechnical parameters in the stability analysis of tailings ponds, which greatly weakens the credibility of the stability calculation. Therefore, this paper studies the stability of tailings ponds by using the principle of hydrogeology, the theory of elastic-plastic mechanics, the idea of limit equilibrium, and the probability analysis model. The boundary conditions of rainfall slope of tailings ponds are determined based on hydrogeological rainstorm analysis and trapezoidal generalization method. The potential sliding surface of tailings pond slope is solved by using the limit strain criterion. Through the random sampling method of Monte Carlo parameters to deal with the randomness of slope geotechnical parameters, the limit strain Monte Carlo reliability analysis method is established. Finally, through the calculation of practical cases, the stability results of tailings ponds under rainstorm are analyzed. The research results provide ideas for the quantitative analysis of tailings pond stability and have important significance for engineering guidelines.

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Mechanical characteristics of non-saturated tailings and dam stability

Cited by 10 publications

References 22 publications

Numerical Simulation on the Evolution of Tailings Pond Dam Failure Based on GDEM Method

Numerical Simulation on the Evolution of Tailings Pond Dam Failure Based on GDEM Method

Comparative Life Cycle Assessment of Conventional and Dry Stack Tailings Disposal Schemes: A Case Study in Northern China

Solution and Stability Analysis of Sliding Surface of Tailings Pond under Rainstorm

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