Study on the Evolution of Tailings Dam Break Disaster under Complex Environment

Luo, Changtai; Li, Dongwei; Xu, Bin

doi:10.3390/su152014728

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…The numerical model showed that the use of cement kiln dust, re-cycled gypsum B mixture, increased the overall stability of the tailings dam above the traditional 1.5 factor of safety requirements. Failure of tailings dams under different conditions was investigated [32]. The results display that the grain size distribution of the model sand should be moderate.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of the Almagrera Tailings Dam with Dry Closure Condition

Morales-Esteban,

Alpañés,

Castillo

et al. 2024

Sustainability

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In light of growing concerns over sustainability, particularly in the wake of environmental disasters like the Aznalcollar dam break, the Spanish authorities have heightened their awareness of issues surrounding ore tailings management.The main aim of this paper is to study the dynamic behavior for the dry closure of the Almagrera dam under the action of an earthquake. This study was carried out with the Plaxis 2D v9.02 program, which uses the finite element (FE) method. The dynamic analysis of the dam was interpreted in terms of deformations, displacements and principal stresses. The construction of the Uniform Seismic Hazard Acceleration Response Spectrum (USHARS) and the selection of real accelerograms for the time-history dynamic calculations is a noted feature of this research. Numerical analyses show that the dam is safe enough because a failure surface has not been formed, although several plastic zones may appear in the dam. The FE study of deformations display that the tailings may attain large deformations, displacements and failure, although this does not jeopardize the safety of the dam where the displacements are smaller than 3 mm. Neither the tailings nor the dam are expected to suffer liquefaction. It was determined that the 0.09 g threshold value is not exceeded in the acceleration-time graphs on the old reservoir field surface, which is the most critical situation.

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Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of the Almagrera Tailings Dam with Dry Closure Condition

Morales-Esteban,

Alpañés,

Castillo

et al. 2024

Sustainability

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Study on the Characteristics and Evolution Laws of Seepage Damage in Red Mud Tailings Dams

Chang,

Dong,

Liu

et al. 2024

Water

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Seepage damage is a significant factor leading to red mud tailings dam failures. Laboratory tests on seepage damage were conducted to investigate the damage characteristics and distribution laws of red mud tailings dams, including soil pressure, infiltration line, pore water pressure, dam displacement, and crack evolution. The findings revealed the seepage damage mechanisms of red mud slopes, offering insights for the safe operation and seepage damage prevention of red mud tailings dams. The results showed that the higher the water level is in the red mud tailings dam, the higher position the infiltration line is when it reaches the slope face. At the highest infiltration line point of the slope surface, the increase of pore water pressure is the highest and the change of horizontal soil pressure is the highest. Consequently, increased pore water pressure leads to decreased effective stress and shear strength, increasing the susceptibility to damage. Cracks resulting from seepage damage predominantly form below the infiltration line; the higher the infiltration lines is on the slope surface, the higher the position of the main crack formations is. The displacement of the dam body primarily occurs due to the continuous expansion of major cracks; the higher the infiltration lines are on the slope surface, the larger the displacement of the dam body is.

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The Coupled Application of the DB-IWHR Model and the MIKE 21 Model for the Assessment of Dam Failure Risk

Ma,

Zhou,

Yue

et al. 2024

Water

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The phenomenon of global climate change has led to an increase in the frequency of extreme precipitation events, an acceleration in the melting of glaciers and snow cover, and an elevation of the risk of flooding. In this study, the DB-IWHR model was employed in conjunction with the MIKE 21 hydrodynamic model to develop a simulation system for the dam failure flow process of an earth and rock dam. The study concentrated on the KET reservoir, and 12 dam failure scenarios were devised based on varying design flood criteria. The impact of reservoir failures on flood-risk areas was subjected to detailed analysis, with consideration given to a range of potential failure scenarios and flood sizes. It was determined that under identical inflow frequency conditions, the higher the water level, the more rapid the breakout process and the corresponding increase in flood peak discharge. Conversely, for a given frequency of incoming water, an elevated water level results in a transient breach process, accompanied by a reduction in flood peak flow. Moreover, for a given water level, an increase in water frequency results in a reduction in breaching time, an extension of flood duration, and an increase in flood peak flow. The observed trend of flood spreading is generally north-south, and this process is highly compatible with the topographic and geomorphological features, demonstrating good adaptability.

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Study on the Evolution of Tailings Dam Break Disaster under Complex Environment

Cited by 3 publications

References 22 publications

Dynamic Analysis of the Almagrera Tailings Dam with Dry Closure Condition

Dynamic Analysis of the Almagrera Tailings Dam with Dry Closure Condition

Study on the Characteristics and Evolution Laws of Seepage Damage in Red Mud Tailings Dams

The Coupled Application of the DB-IWHR Model and the MIKE 21 Model for the Assessment of Dam Failure Risk

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