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  • Stability of tailings dams under static and seismic

    The stability of tailings dams has drawn much attention over the past few decades as a significant number of tailings dam failures have been recorded worldwide. The present study focuses on the investigation of the behavior and the stability of this kind of earth structure under static and dynamic loading. To accomplish this task, elaborate two

  • Stability of tailings dams under static and seismic loading

    Request PDF Stability of tailings dams under static and seismic loading The stability of tailings dams has drawn much attention over the past few decades as a significant number of tailings

  • Stability of tailings dams under static and seismic

    Tailings dams are very susceptible to seismic hazard mainly due to the liquefactionrelated phenomena that can be caused by the earthquake shaking (Ishihara 1984; Kostaschuck et al. 1999; Mahmood and Mulligan 2002) and liquefaction may occur in tailings dams even under static-loading conditions (Dawson et al. 1998). Furthermore, in the case of marginal static stability, even vibrations caused

  • Stability of Tailings Dams DiVA portal

    An upstream tailings dam, under undrained conditions, may be sensitive to liquefaction-induced failures due to seismic shaking or static loading. If a tailings dam is located in a non-seismic zone, still it may be susceptible to flow failure due to static liquefaction. The loose and contractant tailings may liquefy due to rapid rate of

  • STATIC LIQUEFACTION IN TAILINGS DAM AND FLOW FAILURE

    Static slope failure happens when the imposed stress on the embankment or foundation exceeds the peak of effective shear stress-shear strain (strength-deformation) (Figs. 3, 4). Two main factors affecting the static stability of slope are the shear strength of tailings dam and pore pressure. Static

  • Tailingsfo What Are Tailings? Their nature and production

    Physical composition and stability (static and seismic loading) Behaviour under pressure and consolidation rates; Erosion stability (wind and water) Settling, drying time and densification behaviour after deposition; Hard pan behaviour (e.g. crust formation on top of the tailings)

  • A simplified approach to assess seismic stability of

    A significant number of analytical and numerical studies were conducted on stability assessment of tailings dams under both static and seismic conditions. Study on the seismic stability of tailings dams has gained importance over the past decades ( Okusa and Anma, 1980,Penman, 2001 ) as a significant number of such structures have failed to sustain the strong earthquakes mainly in Chile and

  • (PDF) Some considerations in the stability analysis of

    Upstream constructed tailings dams represent a significant challenge to the geotechnical engineer in terms of analysis of their stability, in large part because the shear strength of the loose

  • Missouri University of Science and Technology Scholars' Mine

    quasi-static and static loading of the tailings can occur. Fig. 1. Various causes of mine tailings dam failures in the world (Rico, Benito, Salgueiro, Diez-Herrero, & Pereira, 2008). If tailings dam liquefaction does occur, the risks are high costs, hindered public perception, environmental cleanup and

  • Modified Centreline Construction of Tailings Embankn1ents

    strength tailings, has historically utilized conventional earth or rockfill embankments constructed as a full embankment section similar to a water retaining dam. No reliance is placed on the strength of the tailings and the embankment section is stable under all conditions of static and seismic loading

  • STABILITY INVESTIGATION OF ETI COPPER MINE TAILINGS DAM

    stability investigation of eti copper mine tailings dam using finite element analysis a thesis submitted to the graduate school of applied and natural sciences of middle east technical university by esra nur tanriseven in partial fulfillment of the requirements for the degree of master of science in mining engineering september 2012 . ii approval of the thesis: stability investigation of eti

  • Geotechnical Design and Factors of Safety

    materials under static loading or may be induced by seismic activity, such as liquefaction. Some of the practices within industry to address settlement include foundation improvements, proper compaction of dam materials and cambering of dam structures. The impacts of dam and foundation settlement should be reviewed during the assessment of existing or new dams. The susceptibility of the dam to

  • Seismic stability of tailing dams WIT Press

    a dam-stability design due to seismic loading. The ground is formed by metamorphic clay shales or middle-strong sand- and claystones. An analysis of regional seismicity showed value for the seismic site intensity from 7 to 8 degrees at MSK-scale. The computation of the dynamic stresses and strains in the dams were performed in the time-domain by finite-element analyses by the method of Seed

  • Seismic Stability and Liquefaction Analysis of Tailings

    FLAC(3D) analyses indicate the critical maximum displacement at crest of the proposed tailings dam section is 5.5 cm under the static loading but it increases to about 16.24 cm under seismic loading. The slope stability analyses provide the minimum value of factor of safety for seismic loading as 1.5 as compared to 2.31 for static loading

  • CONSTRUCTION, DESIGN AND EVALUATION OF TAILINGS DAMS

    embankment, under both static and seismic loading conditions. The major design precept is that the phreatic surface should not emerge from the embankment and should be as low as possible near the embankment face. This basically maintains a pore pressure at the face of the embankment lower than atmospheric pressure plus the weight of the embankment particles and maintains the face of the dam

  • Tailingsfo Conventional Impoundment Storage The

    Water retention dams for tailings differ only slightly from conventional water storage structures. The principal designs and construction techniques are the same, the main difference being that tailings storage embankments have a steeper upstream slope as they do not need to be engineered to cope with the rapid drawdown that is experienced in a conventional water retaining structure (Vick 1990).

  • GUIDELINES ON TAILINGS DAMS ANCOLD

    Guidelines on Tailings Dams and not referred to as a stand-alone document. ANCOLD is pleased to continue its contributions to the promotion of tailings dam safety. The work has been prepared through a great deal of voluntary work by the Tailings Dam Sub-Committee of ANCOLD, led by Mr David Brett. As with all ANCOLD guidelines, this guideline is not a design code or standard and has been

  • CASINO PROJECT: INTERACTIVE DESIGN OF A LARGE TAILINGS DAM

    discontinuous permafrost foundation conditions on dam stability and integrity, and the effect of high confining stresses on the strength and permeability characteristics of the embankment construction materials. RÉSUMÉ : Le projet Casino est une mine de cuivre, d’or et de molybdène dont l’exploitation est planifiée dans le Sud-Ouest du Yukon. L’exploitation se fera à ciel ouvert et

  • U.S. Specialist on Teghout Tailings Facility: "I don't

    Recent tailings dam failures in Canada (Mt. Polley, 2014) and Brazil (Bento Rodrigues, 2015 and Brumadinho, 2019) each occurred under simple static loading. For stability during an earthquake, failure is predicted for a moderate-sized earthquake which results in a peak ground acceleration (PGA) which is 7 to 8 percent of gravity (0.07 0.08g) at the dam site.