Within about ten years of the 1991 edition of the ancold guidelines on design criteria for concrete gravity dams being published the limit state design approach it proposed fell out of favour with. Best practices for tailings dam design revista o empreiteiro. With traditional tools like spreadsheet models, cad and mine design packages, scheduling and volumetric modeling of tailings areas can be a very painful experience, often producing oversimplified solutions. For the earth dam, geostudio software is the best option. Appendix f1 tailings storage facility design report.
The procedure usually adopted in such cases is to separate the tailing into coarse sand and fines in a. There are three raised tailings dam designs, the upstream, downstream and centerline, named according to the movement of the crest during raising. The waste and water management strategy and tailings dam design have been optimised during successive design stages as a better understanding of the waste characteristics and site conditions. Design, and analysis of tailings dams bitech publishers ltd. The specific design used is dependent upon topography. Design, construction and management of tailings storage. But how can we do this quickly without software like muck 3d and vulcan. The structure type of qinglong tailing is the valley type. Keeping tabs on the stability of tailings dam walls and slopes, as well as the level and behavior of water, slimes, and other materials present in the dam is vital. Undisclosed subsurface conditions way be encountered which may materially affect the design of the dam. The dam s performance will largely be controlled by the care and thoroughness exercised during its construction.
Best practices for tailings dam design revista minerios. Mechanical properties of the construction material, internal material layout along with dam geometry consisting of slope ratios of 2. The procedure usually adopted in such cases is to separate the tailing into coarse sand and fines in a classifier, and to use the coarse product to build up the wall. A conventional impoundment is a surface retaining structure designed to store both tailings and mine water, with the aim of reclaiming the water for use in the processing plant as required. Vick, john wiley sons external link, new york, 1983, 369 p. Dams and tailings dams monitoring with a solution for all types of movement, groundprobes systems are ideal for realtime stability monitoring of dams and tailings dams. Guide to preparation of design report for tsfs page 5 of 35 introduction tsf design justification the tailings storage facility tsf design report presents an analysis of the background conditions and.
Chapter 11 design and construction of tailings dams by leo casagrande professor of the practice of foundation engineering harvard university and bruce n. Provide sufficient storage for the tailing overflow until the embankment shell constructed of compacted underflow tailing materials. Conventional impoundment storage the current techniques. Mechanical properties of the construction material, internal material layout along with dam geometry. Flowdeformation coupled unsaturated soil model is built based on rainfall infiltration condition and modified mohrcoulomb failure criterion according to modeling a tailing dam with abaqus. Undisclosed subsurface conditions way be encountered which may materially affect the.
Huesker studies each tailings dam project individually and offers dedicated analysis and embankment stabilization design and supply capabilities, through the incorporation of superior flexible reinforcement geogrids and geotextiles. The final objective of the tailings dam design is to allow a safe sustainable closure condition. Before the 1960s, mine tailings were often disposed directly into ponds, lakes, rivers or natural topographic depressions, or stored in impoundments supported by earthen dams, without necessarily applying engineering principles mcleod et al. Provide sufficient storage for the tailing overflow until the embankment shell constructed of compacted underflow tailing materials reached the crest of the starter dam. The knowledge to design, construct, and close, safe sustainable tailing dams is available however there is. Mclver partner casagrande consultants arlington mass. To ensure a safe design, the designer must be able to confirm design assumptions and revise the dam design if unanticipated. Tailings dam classification and breach analyses, perspectives. Reliable and repeatable mapping of structures such as tailings dams helps operations to meet regulatory and. The started dam needs to be design with a free draining dyke foundation. Operational tailings management for successful closure.
The dams performance will largely be controlled by the care and thoroughness exercised during its construction. Modelling a tailings deposition using civil 3d kriging. Pdf design, construction and management of tailings. Designing safe and stable tailings dam structures with. The main design requirements for the starter dam were as follows.
Public database of mine tailings storage facilities. What is the best software to design the structure dam. Huesker studies each tailings dam project individually and offers dedicated analysis and embankment stabilisation design and supply capabilities, through the incorporation of superior flexible reinforcement geogrids and geotextiles. The waste and water management strategy and tailings dam design have been optimised during successive design stages as a better understanding of the waste characteristics and site conditions was obtained. Your teams will benefit from improved dam systems coordination and analysis, which will result in the delivery of worldclass dam infrastructure. An environmental study is being carried out on whether an hdpe liner should be used with the tailing pond and dam or whether the areas clay is thick enough for containment. You can do stability modeling with slopew, seepage modeling with seepw, stress and deformation modeling with sigmaw and so on. The development of the tmf design and resulting key embankment dam design. How to manage tailings dams better with drone surveying. Olympic dam expansion project tailings storage facility design report p 7 of 105 1 introduction 1. Keeping tabs on the stability of tailings dam walls and slopes, as well as the level and behavior of. Modified centreline raise of an tailings storage facility jon engels introduction. Two basic techniques for constructing tailings dams will be covered in this report 1 the use of mill tailings themselves as the construction medium and 2 the use of borrow material to construct the retaining structure and impound the tailings. With traditional tools like spreadsheet models, cad and mine design.
Design, construction and operation of a large centerline. Based on lessons learned from the investigations of the recent mount polley and fundao tailings dam failures in british columbia, canada and minas gerais, brazil respectively, government agencies, regulatory bodies and industry are improving how tailings dams are designed, built and maintained. After expansion, the total height of the dam is up to 43. Tailing dams and the use of software for their design item menu. Since drone surveying is cheaper and faster, you can also survey more often.
Tailings dam monitoring mine design technologies mdt. Geotechnical evaluations of a tailings dam for use by a. Epa technology innovation and field services division. With just a few clicks, you can see volume numbers and locations where theres more or less material in your dam. An essential part of risk management is the quantification of risk. Tailings dam safety monitoring and early warning based on. After expansion, the total height of the dam is up.
Abstract similarities are noted in the practices and problems of constructing dams to impound mine tailings fly ash and chemical wastes. Bentley s hydroelectric dam design solution enables design visualization for you to explore design alternatives and manage data across the entire project lifecycle. Chapter 11 design and construction of tailings dams authorstream. Seepage monitoring and analysis of embankment dams2014 duration. The topography of the area where the tailings dam is built should be carefully considered.
Pt1part 1 mine t ili f ilit d i dtailings facility design and operations instructor. Public database of mine tailings storage facilities launched. Water flows much differently than tailings based on their nonnewtonian properties and a breach does not mean that all of the tailings will leave. Tailings dam construction design of slime is likely to slide and cause the dam to break away. Reliable and repeatable mapping of structures such as tailings dams helps operations to meet regulatory and safety requirements.
The knowledge to design, construct, and close, safe sustainable tailing dams is available however there is a failure within the engineering, education, regulatory and industry bodies to consistently implement good tailing dam design practices. Provide storage for the pmf during the first year of operation. The construction and use of a conventional tailings dam to store tailings from large mining projects has been avoided in papua new guinea until hidden valley. The lack of any comprehensive tailings dam database has prevented meaningful analysis, either gross comparisons such as country to country comparisons, or tailings dam failures versus hydro dam failure rates or technical failure analysis to help prevent future incidents. Best practices for tailings dam design klohn crippen. With the accumulation of the tailings, the coarse material s eparates from the fine and it creates what it is called a tailings beach. Tailing dams and the use of software for their design. Tailing dams and the use of software for their design university of florida bachelor.
Tailings dam failures are different from water dam failures in that in addition to a release of water there is potential for the dam breach to also result in the release of liquefied tailings. Chapter 11 design and construction of tailings dams. The yanghuya tailings dam, which is located in the city of zibo, china, exposes the residential area below the dam to a high level of flood debris risk, and, as such, the stability of the tailings. Introduction seepage control is a critically important aspect in the design, construction, and operation of tailings dams as it directly affects. Tailing disposal methods and tailings dam construction design. This is particularly true of certain concepts and organizational emphases, as well as many of the tables and figures. Tailings dam monitoring is an important component of overall surface mine management and control.
You can then view and measure your tailings dam in 3d. Planning, design, and analysis of tailings dams, by steven g. Association of state dam safety officials asdso 3,174 views. Whether the movement is known or unknown, high risk or gradual, a custom monitoring solution can be tailored to suit the monitoring needs of any dam or tailings dam globally. Oct 02, 2014 a tailings deposition that looks realistic, showing flow originating from each point a spigot at a specified grades outwards until it is bound by the existing ground or a designed embankment. In some cases, this document presents a digest of vicks overall approach to tailings dam planning and design. Knutsson lulea university of technology, sweden abstract knowledge on tailings dams design is often derived from conventional earth and rock fill dams that are designed for relatively short service periods. Oct 15, 20 seepage monitoring and analysis of embankment dams2014 duration. Introduction seepage control is a critically important. Corridor sands tailings storage facility adriaan meintjes the fines will require a storage volume of 168million m3 and an evaporation area of 12.
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