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

Ming, Li Q.; Zou, Hong; Wang, Jie; Yun, Zhao Z.

doi:10.3389/feart.2022.901904

Cited by 7 publications

(5 citation statements)

References 24 publications

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“…The results of the grouting experiments in Fig 9 clearly show that the slurry-particle deposition interface exhibits a bell-shaped half. This is consistent with the whole range of bell shape formed by the slurry particles deposited during numerical simulation [30,31].…”

Section: Plos Onesupporting

confidence: 87%

Study on the diffusion and deposition law of pore slurry in gangue filling zone based on CFD-DEM coupling

Ji,

Gao,

Guo

et al. 2024

PLoS ONE

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In this study, the slurry diffusion in a cavity filled with coal gangue was studied by combining experimental and numerical simulation methods. By calibrating slurry and particle materials, the grouting process in coal gangue filling area is simulated successfully, and the change of slurry diffusion flow field and particle movement and settling process in different dimensions are deeply analyzed. Both experimental and numerical simulation results show that the particle settlement presents a bell-shaped curve, which is of great significance for understanding the particle movement and settlement behavior in the filling cavity. In addition, it is found that the grouting speed has a significant effect on the particle settlement during the slurry diffusion process. When the grouting speed increases from 0.1m /s to 0.2m /s, the particle settlement and diffusion range increases about twice. In the plane flow field, it is observed that the outward diffusion trend and speed of grouting are more obvious. It is worth noting that in the whole process of grouting, it is observed that with the increase of grouting distance and depth, both the velocity of slurry and particles show a trend of rapid initial decline and gradually slow down, and the flow velocity of slurry near the grouting outlet at a flow rate of 0.2m/s is 2–4 times that of 0.1m/s. This provides important enlightenment for the porous seepage effect at different grouting speeds.

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Section: Plos Onesupporting

confidence: 87%

Study on the diffusion and deposition law of pore slurry in gangue filling zone based on CFD-DEM coupling

Ji,

Gao,

Guo

et al. 2024

PLoS ONE

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“…Some scholars analyzed the influence of initial water content on the soil sedimentation property and discovered that the sedimentation stabilization time and the initial water content exhibited good power exponent relationship. , Meanwhile, temperature and pH value also affect the pore water pressure and cohesion of tailings. , However, tailing particle size distribution has a relatively more significant influence on sedimentation and consolidation. Some scholars carried out static sedimentation tests of ultrafine tailings to investigate the sedimentation time-history effect of tailings and compare the sedimentation and consolidation properties of sandy and viscous tailings in still water. − With regard to numerical simulation, numerous studies simulated the grain flow based on the discrete element method to analyze the motion rules of different particles under water power. − To sum up, the change in tailings particle size will affect the self-weight sedimentation and consolidation processes, which may lead to changes in tailings pond parameters, such as dry beach surface and saturation line height.…”

Section: Introductionmentioning

confidence: 99%

“… 30 − 32 With regard to numerical simulation, numerous studies simulated the grain flow based on the discrete element method to analyze the motion rules of different particles under water power. 33 − 35 To sum up, the change in tailings particle size will affect the self-weight sedimentation and consolidation processes, which may lead to changes in tailings pond parameters, such as dry beach surface and saturation line height.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Tailings Deposition Distribution Pattern and Sedimentation Characteristics

Tian,

Zhao,

Gong

et al. 2024

ACS Omega

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Tailings pond accidents frequently occur during an extended period, resulting in loss of life and property, wastage of resources, and environmental pollution. Relying on tailings pond engineering, this paper carried out sample particle fragmentation experiments and settling column experiments to explore the deposition distribution pattern of tailings in both horizontal and vertical directions as well as the impact of particle size distribution on the sedimentation stratification effect. The results show that the median particle size on the dry beach surface in the horizontal direction slowly decreased with the increase in the distance from the subdam. The particle size of tailings showed great fluctuations in the vertical direction, which gradually became finer with the increase in the depth overall. At the same time, saturated sedimentation experiments suggested the inconsistent variation rule with the field test, namely, coarse on the bottom and fine at the top, and the change in particle size greatly affected the tailing sedimentation stratification effect. With the increase in fine particle content in tailings, the appearance time of the water–sand interface was shortened to within 30 min, but the sedimentation and consolidation completion times were delayed to about 1400 min. The settling column results indicate that the increase in fine particle content gradually weakened the sedimentation stratification effect, and the sedimentation pattern transformed from independent sedimentation to floc-type average sedimentation, which led to the enhanced water-retaining property of the settled layer. This may lead to an increase in the saturation line and a decrease in the length of the dry beach, seriously affecting the safe operation of the tailings pond. The research results provide some theoretical guidance and basic data for analyzing the consolidation efficiency of tailings and the stability of the tailings pond.

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“…However, the mesh method is easy to produce mesh distortion when tracking the gear transmission in real time, especially when facing large deformation and crack expansion, which causes calculation errors or abort. 6,7…”

Section: Introductionmentioning

confidence: 99%

Meshing impact analysis of the gear and rack of the pumping machine based on the SPH–FEM coupling method

Di,

Ahmat,

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part K:

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This paper explores the feasibility of using the coupled smooth particle hydrodynamics–finite element method (SPH–FEM) to study the gear rack and meshing impact problem. Firstly, a numerical model containing both SPH and FEM units is established, and its accuracy is verified. Then, the principle of gear rack meshing impact is analyzed from the perspective of impact dynamics theory, and the formula of maximum meshing impact force is derived. Finally, the meshing impact process of the rack and pinion is simulated using the coupled SPH–FEM method, and experiments are designed to verify it. The analysis results show that the SPH–FEM coupling method can simulate the meshing impact behavior of the gear mechanism more accurately. On the other hand, the severity of the impact in each operating section was obtained. It is also found that the impact stress has reached the material's tensile limit, revealing the mechanism of tooth surface wear caused by the impact. The results of the study provide a choice of research methods for gear mechanism meshing impact and also provide some reference for gear rack tooth shape optimization.

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

Cited by 7 publications

References 24 publications

Study on the diffusion and deposition law of pore slurry in gangue filling zone based on CFD-DEM coupling

Study on the diffusion and deposition law of pore slurry in gangue filling zone based on CFD-DEM coupling

Experimental Study on Tailings Deposition Distribution Pattern and Sedimentation Characteristics

Meshing impact analysis of the gear and rack of the pumping machine based on the SPH–FEM coupling method

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