Effects of Geosynthetic Reinforcement on Tailings Accumulation Dams

Du, Changbo; Liang, Lidong; Fu, Yi; Niu, Ben

doi:10.3390/w13212986

Cited by 7 publications

(6 citation statements)

References 22 publications

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“…This study was based on field tests of reinforced tailings stacking dams in the Fengshuigou tailings pond 30 . ABAQUS simulations were performed for the field tests, a finite element model was established, an inverse trial analysis was performed, and the simulation results were compared with the field monitoring results to obtain a more reasonable calculation model and calculation parameters.…”

Section: Field Test Simulation and Determination Of Permeability Coef...mentioning

confidence: 99%

“…The parameters involved in this permeability coefficient inversion included the permeability coefficients of the stacked dam body and geogrid. According to the report provided by the geogrid manufacturer and the related literature 30 , the range of the permeability coefficient and the initial value of the trial calculation were determined, as shown in Table 3 .…”

Section: Field Test Simulation and Determination Of Permeability Coef...mentioning

confidence: 99%

“…In this study, based on the previously conducted field test 30 of the Fengshuigou tailings reservoir, reasonable model parameters were selected by ABAQUS finite element software, and the conventional accumulation dam and geogrid reinforced accumulation dam of the field test were simulated and calculated, respectively. By comparing the test and simulation results, the accuracy of the model parameter inversion was assessed.…”

Section: Introductionmentioning

confidence: 99%

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Seepage stability analysis of geogrid reinforced tailings dam

Du,

Tao,

2024

Sci Rep

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To investigate the influence of a geogrid-reinforced tailings dam on the seepage stability of the dam body, this paper was based on the field test of a reinforced tailings accumulation dam. The study utilized the finite element strength reduction method to simulate the stability of the main dam of the Fengshuigou tailings reservoir under different seepage conditions using ABAQUS software. Additionally, the paper discussed the impact of conventional heightening, dry beach length, and geogrid reinforcement on the position and safety factor of the saturation line of the dam body. The results showed that when the dam body was raised, the saturation line rose by 2.8–5.3 m, resulting in a decrease in the safety factor. The geogrid effectively reduced the height of the saturation line in the tailings dam. In comparison to the unreinforced condition (dam heightening), the saturation line of the tailings dam decreased by 0.9–2.8 m under the local reinforcement condition and by 3.2–12.5 m under the overall reinforcement condition. The geogrid significantly improved the stability of the tailings dam. Furthermore, under the local reinforcement condition, the safety factor of the dam increased by 3.8–5.5%, and under the overall reinforcement condition, it increased by 35.9–42.9%, when compared to the unreinforced condition. Increasing the dry beach length improved the stability of the tailings dam, and under normal working conditions, the safety of the tailings dam was much higher than under the minimum dry beach condition. These results served as a reference for the design of the dam and the new tailings reservoir, laying a foundation for the sustainable development and environmental protection of the tailings pond.

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Section: Field Test Simulation and Determination Of Permeability Coef...mentioning

confidence: 99%

Section: Field Test Simulation and Determination Of Permeability Coef...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seepage stability analysis of geogrid reinforced tailings dam

Du,

Tao,

2024

Sci Rep

Self Cite

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“…Sánchez-Peralta et al [11] took a dry tailings pond in Colombia as the research object, studied the movement characteristics of dam break debris flow with different water contents, and obtained the relationship between the length and width of dam break debris flow movement. Changbo Du et al [12] studied and analyzed the influence of reinforcement on tailings dam and the change law of pore water pressure and internal pressure of the dam body after mud discharge. The pore water pressure and internal earth pressure of the accumulation dam after grouting gradually increased with time.…”

Section: Introduction 1research Statusmentioning

confidence: 99%

Study of a Tailings Dam Failure Pattern and Post-Failure Effects under Flooding Conditions

Gao,

Liu,

et al. 2023

Water

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Tailings dams are structures that store both tailings and water, so almost all tailings dam accidents are water related. This paper investigates a tailings dam’s failure pattern and damage development under flood conditions by conducting a 1:100 large-scale tailings dam failure model test. It also simulates the tailings dam breach discharge process based on the breach mode using FLOW-3D software, and the extent of the impact of the dam failure debris flow downstream was derived. Dam failure tests show that the form of dam failure under flood conditions is seepage failure. The damage manifests itself in the form of flowing soil, which is broadly divided into two processes: the seepage stabilization phase and the flowing soil development damage phase. The dam failure test shows that the rate of rise in the height of the dam saturation line is faster and then slower. The order of the saturation line at the dam face is second-level sub-dam, third-level sub-dam, first-level sub-dam, and fourth-level sub-dam. The final failure of the tailings dam is the production of a breach at the top of the dam due to the development of the dam’s fluid damage zone to the dam top. The simulated dam breach release results show that by the time the dam breach fluid is released at 300 s, the area of over mud has reached 95,250 square meters. Local farmland and roads were submerged, and other facilities and buildings would be damaged to varying degrees. Based on the data from these studies, targeted measures for rectifying hidden dangers and preventing dam breaks from both technical and management aspects can be proposed for tailings dams.

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“…Researchers have simulated the accumulation dam's overflow failure process in order to analyze the seepage failure of the dam. Du (2021) studied the stability of the dam reinforced by a geogrid and geotextiles through a model test of a tailings dam reinforced in the design site, primarily analyzing the change in pore pressure and pressure inside the dam under the action of water pressure, and obtaining the reinforcing mechanism of the two materials [21]. The general design of the dam body and the physical characteristics of dam filling are both factors in the dam's collapse mechanism.…”

Section: Introductionmentioning

confidence: 99%

Study on Filling Material Strength and Dam Failure Characteristics of Loess Dam

Chen

Wei

et al. 2023

Applied Sciences

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In the Loess Plateau region, loess, as a widely distributed building material, is often used as a filling material for dams. When the water level reaches a certain height, the body of a dam is prone to shear failure due to the penetration of water. The change in the shear performance of local loess filler can affect the overall strength of loess dams. Therefore, the filler of a loess dam is selected to study the shear performance. The progressive failure process of a loess dam is simulated. The shear failure characteristics of loess filler under the influence of water content, confining pressure, and dry density were explored. The characteristics of the shear failure of a loess dam were analyzed. The remolded loess is prone to shear expansion failure under low confining pressure, low water content, and high dry density, and is prone to shear shrinkage failure under high confining pressure, high water content, and low dry density. When the water content is constant, the cohesion increases with the increase in dry density. When the dry density is constant, the internal friction angle generally increases with the increase in water content. However, when the dry density is high, the permeability of the remolded loess is weakened, resulting in uneven water distribution under a low water content, which affects the test results. The failure process of the loess dam is a progressive shear failure, which is affected by the water level and water pressure, and is destroyed under the action of pore water pressure and water body lateral pressure.

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Effects of Geosynthetic Reinforcement on Tailings Accumulation Dams

Cited by 7 publications

References 22 publications

Seepage stability analysis of geogrid reinforced tailings dam

Seepage stability analysis of geogrid reinforced tailings dam

Study of a Tailings Dam Failure Pattern and Post-Failure Effects under Flooding Conditions

Study on Filling Material Strength and Dam Failure Characteristics of Loess Dam

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