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Modelling Of Seepage Through Tailings Dams
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Book Synopsis Modelling of Seepage Through Tailings Dams by : R. H. Coulton
Download or read book Modelling of Seepage Through Tailings Dams written by R. H. Coulton and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Long-Term Seepage Assessment Using Numerical Modeling for Upstream-Type Tailings Dams by : Chengcheng Xu
Download or read book Long-Term Seepage Assessment Using Numerical Modeling for Upstream-Type Tailings Dams written by Chengcheng Xu and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A tailings dam, as part of a tailings storage facility, is typically constructed using waste rock or mine tailings, which are the waste created during extraction of ore from mining or by-products from mineral beneficiation and manufacturing. These dams are often raised continuously, as the tailings facility is expanding. The holding capacity of these facilities is needed to accommodate large volumes of tailings with the increasing demand placed on the mining industry. Thus, the topic of focus in this thesis is to investigate the seepage conditions that can ensure that the embankment can be safely constructed and operated during the raising stage and that it remains safe afterwards, beyond closure of the mine. However, according to statistics, a tailings dam must be protected against failures caused by various reasons even during its construction stage. Structural stability is the most important aspect and it should to be considered when addressing the problem of "safety" for tailings dams, which are threatened by seismic liquefaction, slope instability, overtopping and seepage. The seepage conditions of upstream-type tailings dams are the main topic of this research, which is associated with knowing the position of phreatic surface. The amount of pore water below the phreatic surface affects the stability of a tailings dam by reducing the shear strength of soil. The purpose of this thesis is to develop a seepage analysis model using a numerical modeling technique and to investigate potential means of phreatic surface control. Parameters like beach width, permeability anisotropy, raising rate of embankment and slope inclination will be investigated to identify factors that may have a significant influence on the long-term evolution of phreatic surface within the tailings dam during the mine's life. This research will develop an uncoupled hydro-mechanical model using finite elements in which the whole process of construction is simulated in stages of embankment raising and filling of the tailings pond. The finite element model will be built using RS2, which is a comprehensive two-dimensional finite element program for soil and rock applications. It can model a wide range of engineering projects including excavation design, slope stability analysis, groundwater seepage, probabilistic analysis, and dynamic analysis. RS2 is able to carry out a finite element groundwater seepage analysis, with due consideration of both saturated and unsaturated soil states, in both steady-state and transient groundwater seepage formulations through both homogeneous and heterogeneous dams, dikes and other embankment types. However, basic finite element analysis principles will also be presented in this thesis, to aid the comprehension of the models developed. Based on the results of modeling, each identified parameter was assessed and guidelines were given regarding its contribution in the development of seepage face breakout on the downstream face of tailings embankment dams. These guidelines can serve practicing engineers in their design and evaluation of tailings dams to ensure safe and economical operation of tailings facilities.
Book Synopsis Determining Seepage Characteristics of Mill-Tailings Dams by the Finite-element Method by : C. Daniel Kealy
Download or read book Determining Seepage Characteristics of Mill-Tailings Dams by the Finite-element Method written by C. Daniel Kealy and published by . This book was released on 1971 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seepage Patterns in Mill-tailings Dams as Determined by Finite-element Models by : C. D. Kealy
Download or read book Seepage Patterns in Mill-tailings Dams as Determined by Finite-element Models written by C. D. Kealy and published by . This book was released on 1970 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geotechnical Engineering of Dams, 2nd Edition by : Robin Fell
Download or read book Geotechnical Engineering of Dams, 2nd Edition written by Robin Fell and published by CRC Press. This book was released on 2014-11-21 with total page 1384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geotechnical Engineering of Dams, 2nd edition provides a comprehensive text on the geotechnical and geological aspects of the investigations for and the design and construction of new dams and the review and assessment of existing dams. The main emphasis of this work is on embankment dams, but much of the text, particularly those parts related to geology, can be used for concrete gravity and arch dams. All phases of investigation, design and construction are covered. Detailed descriptions are given from the initial site assessment and site investigation program through to the preliminary and detailed design phases and, ultimately, the construction phase. The assessment of existing dams, including the analysis of risks posed by those dams, is also discussed. This wholly revised and significantly expanded 2nd edition includes a lengthy new appendix on the assessment of the likelihood of failure of dams by internal erosion and piping. This valuable source on dam engineering incorporates the 200+ years of collective experience of the authors in the subject area. Design methods are presented in combination with their theoretical basis, to enable the reader to develop a proper understanding of the possibilities and limitations of a method. For its practical, well-founded approach, this work can serve as a useful guide for professional dam engineers and engineering geologists and as a textbook for university students.
Book Synopsis Physical Modelling in Geotechnics, Volume 2 by : Andrew McNamara
Download or read book Physical Modelling in Geotechnics, Volume 2 written by Andrew McNamara and published by CRC Press. This book was released on 2018-07-11 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical Modelling in Geotechnics collects more than 1500 pages of peer-reviewed papers written by researchers from over 30 countries, and presented at the 9th International Conference on Physical Modelling in Geotechnics 2018 (City, University of London, UK 17-20 July 2018). The ICPMG series has grown such that two volumes of proceedings were required to publish all contributions. The books represent a substantial body of work in four years. Physical Modelling in Geotechnics contains 230 papers, including eight keynote and themed lectures representing the state-of-the-art in physical modelling research in aspects as diverse as fundamental modelling including sensors, imaging, modelling techniques and scaling, onshore and offshore foundations, dams and embankments, retaining walls and deep excavations, ground improvement and environmental engineering, tunnels and geohazards including significant contributions in the area of seismic engineering. ISSMGE TC104 have identified areas for special attention including education in physical modelling and the promotion of physical modelling to industry. With this in mind there is a special themed paper on education, focusing on both undergraduate and postgraduate teaching as well as practicing geotechnical engineers. Physical modelling has entered a new era with the advent of exciting work on real time interfaces between physical and numerical modelling and the growth of facilities and expertise that enable development of so called ‘megafuges’ of 1000gtonne capacity or more; capable of modelling the largest and most complex of geotechnical challenges. Physical Modelling in Geotechnics will be of interest to professionals, engineers and academics interested or involved in geotechnics, geotechnical engineering and related areas. The 9th International Conference on Physical Modelling in Geotechnics was organised by the Multi Scale Geotechnical Engineering Research Centre at City, University of London under the auspices of Technical Committee 104 of the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE). City, University of London, are pleased to host the prestigious international conference for the first time having initiated and hosted the first regional conference, Eurofuge, ten years ago in 2008. Quadrennial regional conferences in both Europe and Asia are now well established events giving doctoral researchers, in particular, the opportunity to attend an international conference in this rapidly evolving specialist area. This is volume 2 of a 2-volume set.
Book Synopsis Physical Modeling of Marginally Stable Tailings Dams Using Centrifuge Simulation Techniques by : Herbert J. Sutherland
Download or read book Physical Modeling of Marginally Stable Tailings Dams Using Centrifuge Simulation Techniques written by Herbert J. Sutherland and published by . This book was released on 1984 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tailings and Mine Waste 2002 by : Symposium Editors
Download or read book Tailings and Mine Waste 2002 written by Symposium Editors and published by CRC Press. This book was released on 2002-01-01 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings in this work present 60 papers on mine and mill tailings and mine waste, as well as current and future issues facing the mining and environmental communities. This includes matters dealing with technical capabilities and developments, regulations, and environmental concerns.
Book Synopsis Geotechnical Modeling Workshop by : Gilang Firmanda
Download or read book Geotechnical Modeling Workshop written by Gilang Firmanda and published by Lereng Nusantara . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stability of Tailings Dams by : Muhammad Auchar Zardari
Download or read book Stability of Tailings Dams written by Muhammad Auchar Zardari and published by . This book was released on 2011 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Upstream tailings dams may experience slope stability problems when the rate of raising is too fast. Tailings consolidate slowly due to low hydraulic conductivity. The excess pore pressures can build up due to accelerated rate of raising. The cumulative increase in excess pore pressures due to successive raisings can endanger slope stability of a tailings dam. The stability of a tailings dam is closely related to the consolidation process. The consolidation process and associated stability of an upstream tailings dam during staged construction was modelled with the finite element program PLAXIS. The analysis indicated that the stability of the dam reduced during raising due to increase of excess pore pressures. The safety of the dam was improved by adding rockfill banks on the downstream side. The volume of the rockfill banks was minimized with an optimization technique. This technique involves (i) construction of a rockfill bank on the downstream side when the factor of safety is less than a permissible limit, (ii) utilization of a minimum volume of the rockfill that is necessary to stabilize the slope. This technique can be practicable when the rate of raising is moderate, and partial consolidation occurs between consecutive raisings. Numerical analysis was also performed on a curved embankment of an upstream tailings dam in order to investigate the possible risk of hydraulic fracturing and internal erosion in a corner of the dam. The analysis showed that low compressive stresses occurred above the phreatic level, near the zones of filter and rockfill banks. These zones contain coarse material, and are, therefore, not susceptible to hydraulic fracturing and internal erosion. An increase in the radius of the corner is suggested in order to prevent large reductions in compressive stresses that may occur due to future raisings. Presently the curved dam section is stable. However, an additional rockfill bank on the downstream side will be required for future raisings. Static liquefaction is considered as a common cause of disastrous flow failures of tailings dams. These flow failures can be predicted with numerical modelling using suitable constitutive models. In this context, some constitutive models capable of simulating static liquefaction behaviour of loose saturated sands are reviewed. It is generally concluded that the finite element method can be a helpful tool for modelling stability of tailings dams.
Book Synopsis Relationships for Centrifugal Modelling of Seepage and Surface Flow Effects on Embankment Dams by : D. J. Goodings
Download or read book Relationships for Centrifugal Modelling of Seepage and Surface Flow Effects on Embankment Dams written by D. J. Goodings and published by . This book was released on 1982 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seepage-environmental Analysis of the Slime Zone of a Tailings Pond by : C. D. Kealy
Download or read book Seepage-environmental Analysis of the Slime Zone of a Tailings Pond written by C. D. Kealy and published by . This book was released on 1974 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of Investigations written by and published by . This book was released on 1970 with total page 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Modeling of Seepage in Koyunbaba Dam by : Selim Emre Ozbek
Download or read book Numerical Modeling of Seepage in Koyunbaba Dam written by Selim Emre Ozbek and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dams are very critical structures that are used mainly for energy production, agricultural irrigation, water storage. Seepage problems are seen in dams may require long-term and costly remediation programs by reducing the benefits of projects built for purposes such as drinking, irrigation, and energy. A widespread and potentially dangerous phenomenon related to flooding is seepage under dams, and the formation of sand boils. In this study, Koyunbaba dam located within the boundaries of Ankara/Kalecik county is examined. The study aims to calculate the amount of leakage of the alluvium lateral on the dam foundation and to calculate the optimum location, thickness, depth, and permeability of the slurry trench that can be built under the dam foundation. Groundwater Modeling System SEEP2D software which uses finite element method for calculations is used. The seepage results showed that the slurry trench significantly reduces the seepage. The thickness, depth, and permeability of the slurry trench have also been found to be essential factors in reducing leakage. It has been found that the slurry trench minimizes the leakage by up to 99%. Also, the factor of safety against piping which may occur in the downstream toe of the dam is examined. The coefficient of safety results showed that the base slurry trench should be extended to an impermeable layer or keyed the impermeable layer.
Book Synopsis Mine Water Hydrogeology and Geochemistry by : Paul L. Younger
Download or read book Mine Water Hydrogeology and Geochemistry written by Paul L. Younger and published by Geological Society of London. This book was released on 2002 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Framework for Autonomous Navigation of a Continuous Mining Machine by : Donna L. Anderson
Download or read book Framework for Autonomous Navigation of a Continuous Mining Machine written by Donna L. Anderson and published by . This book was released on 1989 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Information Circular written by and published by . This book was released on with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: