It is therefore essential that while investigating the properties of tailings that the physical characteristics and material parameters e. Tailings deposition is a modelling application that automates the estimation of tailings deposition for a given basin, dam, and spigot configuration. Tailings storage facility conceptual closure plan alternatives assessment es2 three conceptual closure options were evaluated for this study. Conventional tailings have a fine powder deposition that can create dust pollution. The tailings will be covered with an earth fill cover except for a pondwetland area at the location of the final supernatant pond. The combined tailings will be deposited into a conventional, rectangular shaped. Mine tailings subaqueous deposition mine tailings fundamentals. The new owner of a mine site had significant legacy environmental issues to remedy prior to restarting the mine and process plant. Storageelevation curve for a tsf minebridge software inc.
It is typically much easier to access tailings samples from the perimeter of the storage and a natural bias to relatively coarser results in. Chpp module 1 was commissioned in 2002 and chpp module 2 was commissioned in 2007. Steenkamp worleyparsons rsa, johannesburg, south africa the reporting of tailings has historically posed a conundrum in as far as reporting to the correct level of confidence. So how does polymerbased water purification technology help a mining company store tailings more efficiently. Appendix f1 tailings storage facility design report. Best practices for tailings dam design klohn crippen berger. It is the beach slope relating to subaerial deposition that is the main focus of attention in modern day tailings storage facility design and operational management. Paste thickening optimizes tailings disposal and water. With innovative products, global field support and industry leading technical expertise, basf mining solutions provides sustainable solutions which increase productivity, recovery and flexibility throughout the mining operations including leaching, solvent extraction. This alternative involves the subaqueous deposition of whole tailings in a lined impoundment. Tailpro currently works with dustscan uk uk to provide tailings dusting characterisation of tailings facilities. Previous post twenty fourteen child theme how to actually add full width to post content and images next post modelling a tailings deposition using civil 3d. To write a csv file we can simply store the output data from the deposition runs as an array, and this module will format it as a csv text file. Antimony mobility during the early stages of stibnite.
Frequently, tailings are cycloneclassified before deposition. Most modern hardrock metal mines dispose of tailings as a wet mud, held in pits lined with clay or a synthetic liner. Geotechnical properties of mine tailings and implications. A custom wind tunnel is used to determine the mobilisation of dust from a tailings facility using specialist sensors provided by dustscan. The stability of the prefeasibility options was assessed using the software. Ptfi has designed and constructed a system of levees to manage the deposition of what will ultimately be about 3 billion tonnes of tailings within tailings management controlled riverine. Tailings are sometimes over or underestimated, excluded, or incorrectly reported. The application will calculate total volume for an individual cycle. The tailings beach slope is a fundamental parameter for the design and operation of tailings storage facilities because it affects the tailings storage capacity, pond levels, and phreatic surfaces. Informed mine closure by multidimensional modelling of tailings deposition and consolidation h zhou et al.
Rift software rift td tailings deposition modelling software. Mine tailings deposition practices, liquefaction potential. For conventional storage the tailings are generally discharged from spigotsoutfalls located along the embankments of the facility. Leading practice tailings disposal and storage design requires riskbased analysis. Introduction background the subject of this paper is a tailings dam that was. Tailings directive 074 forces operators to capture fines, reduce tailings volumes and reclaim the landscape in no less than 5 years. Missouri university of science and technology scholars mine. Tailings are the materials left over after the process of separating the valuable fraction from the uneconomic fraction of an ore. Leading practice in tailings planning for highthroughput mining. Mine tailings subaerial deposition mine tailings fundamentals. Tailings subaerial and subaqueous deposition and beach.
The aqueous speciation and mineralogy of antimony sb in waters and tailings at beaver brook antimony deposit have been analyzed to understand sb mobility during the initial stages of stibnite sb 2 s 3 weathering in a nearsurface environment. Operational tailings management for successful closure. Polymer technology increases a mines life through better. Mine tailings disposal, and its impact on water usage, is an important concern for any mining company. Any processing plant is variable in its daily operation and tailings properties can change from original design parameters. Single point discharge of tailings subaerial technique jon engels introduction. Chief among these was how to manage several gigalitres of contaminated water held in a disused pit while at the same time using the pit to store newly generated tailings slurry. Tailpro consulting works with specialist international consultants to provide an integrated solution. The majority of the tailings incidents reported to the department could have been avoided if the tailings storage facility had been operated within the design parameters or had been more. Some large mines use entire existing valleys sealed off with earthen dams, and others store tailings in natural lakes. Figure 1 and has a maximum depth of 350 m, will be used to store the future slurry tailings. Mount polley tailings storage facility used to store copper. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
Tailing definition is residue separated in the preparation of various products such as grain or ores usually used in plural. Tailings are distinct from overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without being processed. Wide client base in tailings related projects in base metals, precious metals, and oil sands. Study of tailings management technologies mend report 2. Paste thickening optimizes tailings disposal and water recovery. Large quantities of tailings approximately 70 million tonnes per annum will be stored in an aboveground tailings storage facility tsf. Today, the universal disposal method for tailings is the tailing pond. 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. Tailings production tailings production is controlled by the chpp.
Informed mine closure by multidimensional modelling of. An alternative involves reshaping the tsf during operations using tailings to create the closure landform by modifying the deposition strategy to dispose tailings in targeted areas in the latter stages of the mine life, significantly reducing postoperations earthworks and construction requirements. Design and evaluation of tailings dams epa web archive. The dam was used for the disposal of platinum tailings, and made use of the ringdyke method of. Modelling a tailings deposition using civil 3d kriging. The pyrite concentrate tailings and the general plant tailings will be combined at the plant and pumped to a nearby tailings storage facility tsf as slurry at a design solids content of 55% by mass.
If the depositional sequence allows, it may even be possible to begin closure of portions of the impoundment. Once weve got it running for a single deposition run, we can wrap it in a loop and use a different tailings slope each time. Section 3 presents the need for a lifeofmine riskbased approach to tailings management, and briefly describes this approach. Determination of a tailings storage facility capacity via. Previous post twenty fourteen child theme how to actually add full width to post content and images next post modelling a tailings deposition using civil 3d kriging perimeter deposition. The use of an appropriate software tool such as fluidflow allows. The objective of tailings management is to safely store tailings and reduce the risks, particularly over. Tailings are slurried with water and pumped to tailing ponds for settling. Tailings directive 074 explained oil sands magazine. Deposition modeling of high density tailings using smoothed particle hydrodynamics a thesis submitted to the faculty of graduate and postdoctoral affairs in partial fulfillment of the requirements for the degree masters of applied science by yagmur babaoglu b. Goldsim is a probabilistic simulation and modelling software package that has.
Pour tailings from a fixed elevation with a fixed pond volume. It also allows for control of the beached characteristics of the tailings to shed water at closure while reducing earthworks costs. In webinar may 19, 2015 5 photo courtesy of jack caldwell. Section 4 provides an overview of the key elements of management systems that are applied throughout the life of a tailings storage facility to ensure operating and closure objectives are met. Tailings have no financial gain but must be stored in the most cost effective. Riftxone rift software rift td tailings deposition. Recent examples on the web the mine would also require a tailings facility to store the toxic leftovers, most likely in a wash thats part of the gila river watershed.
The influence of depositional methods on the engineering properties of tailings deposits dr. The processing and storage of mine tailings is a key environmental issue for mining projects around the world. Coarse sands are used to buildup the tailing dam, while the slimes are deposited inside the pond. Utilizing its expertise in slurry dewatering technologies, westpro offers turnkey tailings management systems that allows owners to reduce or eliminate costly tailings ponds by producing stackable tailings. This report describes the design of the proposed tailings storage facilities in support of the environmental impact statement eis and the commitments made therein associated with tailings. Tailings management our tailings group formerly australian tailings consultants has built an international reputation encompassing all aspects of mine tailings management, including tailings testing and characterisation, thickening and dewatering, transport, storage and embankment design, technical assistance during construction, surveillance and auditing, closure and water management. Although the directive itself is quite straightforward, meeting its targets has required oil sands mining operators to do what previously seemed almost impossible. Tailings ponds are massive earth structures used to store coarse and fine solids contained in the oil sands deposit and recover water back to the main processing plant. This application greatly reduces the amount of time required to design and model a tailings fill plan. Fine solids from tailings streams tend to trap large volumes of water, making pond reclamation challenging at best.
Tailings deposition into open pit consolidation modelling. There are principally two types of surface impoundments, a water retention type dam, and a raised embankment that has many configurations vick 1990. Develop conceptual designs for a tailings storage facility quickly, providing for near. Rift td is an advanced threedimensional digital terrain model, specifically developed to model tailings deposition. The engineering characteristics of tailings are in most instances influenced by the degree of thickening and the method of deposition. These ponds are temporary storage facilities and need to be reclaimed when no longer in use. In order to safely store the vast amount of tailings mining waste generated at some mining operations. Goldtail tailings modeling software incorporates consolidation. Many mines put the tailings back into the original mining pit. In most mining operations, tailings are transported to the tsf as a slurry in which the granular tailings material is pulled through a pipeline by the turbulence in the water. Tailings deposition into open pit consolidation modelling and deposition concept 1 introduction mcarthur river mine mrm is planning to utilise the existing pit void, approximately 385 m deep, for long term storage of the tailings and potential acid forming paf waste rock at closure. Dissolution of stibnite in oxidizing conditions releases sb in drainage water and sb is incorporated into the mineral structures of several secondary.
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