Study on Hydraulic Incipient Motion Model of Reinforced Tailings

Liu, Kehui; Cai, Hai Yong; Jing, Xiaofei; Chen, Yulong; Li, Lü; Wu, Shangwei; Wang, Wensong

doi:10.3390/w13152033

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…In recent years, the number of ultrafine tailings reservoirs have been increasing gradually (Li et al, 2019;Shi et al, 2020;Han et al, 2022). However, the research efforts on ultrafine tailings particles are still inadequate, thereby inconducive to future sustainable development (Jing et al, 2019;Jing et al, 2021;Liu et al, 2021;Wang et al, 2022). The physical and chemical properties and engineering characteristics of slag show that slag exhibits aggregate properties.…”

Section: Introductionmentioning

confidence: 99%

Multiscale mechanical characterizations of ultrafine tailings mixed with incineration slag

Jing

Jia³

et al. 2023

Front. Earth Sci.

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Adding a type of municipal solid waste (incinerator slag) into ultrafine tailings can effectively enhance the mechanical properties of tailings. With an aim to study the macro- and micro-mechanical properties of the tailings slag mixture (TSM), the strength parameters (internal friction angle, cohesion) and micro-mechanical properties with different slag contents were analyzed by geotechnical experiments and particle flow simulations, respectively. The macroscale experimental results demonstrated that the strength parameters of TSM were much higher than that of tailings. Strength parameters also showed non-linear-rising trends with increasing slag content. For the slag content of 40%, the maximum cohesiveness of TSM was determined at 65.2 kPa, and the corresponding friction angle was 39.9°C. Furthermore, the Particle Flow Code (PFC) micro-simulation software was used to analyze the micro-mechanical characteristics of the TSM at different slag contents. The microscale simulation outcomes indicated that the particle transport, particularly in their moving directions, became increasingly chaotic with an increase in the slag content; also, the slag particles significantly impacted the shear processing zone of the TSM. These experimental and numerical results brought more scientific insights into the shear failure mechanism of TSM.

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Section: Introductionmentioning

confidence: 99%

Multiscale mechanical characterizations of ultrafine tailings mixed with incineration slag

Jing

Jia³

et al. 2023

Front. Earth Sci.

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“…Rawya M. Kansoh [17] studied the influence of the earth-rock dam's structural parameters on the dam failure process. Kehui Liu et al [18] studied the microscopic characteristics of hydraulic erosion of reinforced tailings dams and revealed the influence of different reinforcement spacing on the critical start-up speed of tailings particles. It shows that the smaller the reinforcement spacing, the greater the critical start-up speed of the reinforced tailings samples.…”

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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Model test of a geogrid-reinforced tailing accumulation dam

Niu²,

Fu³

et al. 2022

Bull Eng Geol Environ

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Study on Hydraulic Incipient Motion Model of Reinforced Tailings

Cited by 6 publications

References 19 publications

Multiscale mechanical characterizations of ultrafine tailings mixed with incineration slag

Multiscale mechanical characterizations of ultrafine tailings mixed with incineration slag

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

Model test of a geogrid-reinforced tailing accumulation dam

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