Worldwide, the storage and handling of tailings is a major environmental issue. He has since devoted a significant part of his life towards this goal for the good of the mining industry and the environment. Construction of tailings dams in north america has traditionally centred on the concept of water retaining type structures with essentially subaequous deposition of. New tailings dams and waste rock dumps will be constructed, to encompass the increased. Many tailings are toxic and must be kept perpetualy isolated from the environment.
Mulligan2 1graduate student, department of building civil and environmental engrg. This application greatly reduces the amount of time required to design and model a tailings fill plan. Chapter 11 design and construction of tailings dams by leo casagrande professor of the practice of foundation engineering harvard university and bruce n. Currently, water balance models of the tsf pond assume a constant tailings. The processing and storage of mine tailings is a key environmental issue for mining projects around the world. Dewatering of tailings and deposition in the form of paste tail ings can be bene.
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, flotation, solidliquid separation and tailings management. 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. What do computer science students think about software piracy. Rift software rift td tailings deposition modelling. Rift software mine magazine issue 72 september 2018. Tailings impoundments have been around for about a century. Draw 3 more path ways on one side of the deposition, a. Modelling a tailings deposition using civil 3d kriging. Mclver partner casagrande consultants arlington mass. Technologies for speeding up the consolidation process have proven effective in benchscale tests. Cerro san cristobal 9511, quilicura, santiago, chile. Upon discharge, the tailings slurry segregates such that the. Tailings remediation with dredge mining technology bart hogeweg andrina drost 2. Chapter 10 investigation of the use of mine tailings for unpaved road base construction ali a.
In situ tailings characteris tics and the potential for liquefaction during seismic loading which may result from the various disposal methods are discussed. A combination of technological developments and an understanding of the flow behaviour rheology of tailings throughout the paste production, transport and deposition process allow for effective. Deepsea mine tailings placement dstp is an alternative to landbased minewaste disposal, whereby mineral ore is converted into slurry and transported via a. Beaching angles and evolution of stack geometry for. Water from the lower end of the strathcona tailings treatment system has been treated and. Subaerial deposition exposes the beached tailings to oxygen and water allowing oxidation of infused sulphides and the production of acids newman, white et al. Use of paste technology for surface deposition and underground backfill of tailings provides an attractive method for minimizing the engineering and environmental challenges commonly associated with the disposal of mineral wastes. Considerations for tailings facility design and operation. Rift td advanced tailings deposition modelling software rift td is an advanced threedimensional digital terrain model, specifically developed to model tailings deposition.
Surface disposal of past tailings at the bulyanhulu gold mine. This type of tailings storage produces a stable deposit usually requiring no retention bunding and is referred to as dry stack. A case history is presented to illustrate how the tailings dam construction method must be coordinated with the method of tailings deposition. Hidensity paste thickener westech engineering, inc. Tailings overview tailings is an application designed to streamline the process of creating surfaces to represent staged deposition to a tailings impound facility. Mend subaqueous deposition of tailings in the strathcona. Who we are royal ihc market leader in integrated vessels, advanced equipment and lifecycle services for the dredging, offshore construction and wet mining markets headquarters in the netherlands, with a global presence. Tailings deposition is a modelling application that automates the estimation of tailings deposition for a given basin, dam, and spigot configuration. A new layer of tailings are then placed over the dried area at a time corresponding to the facilitys discharge zoning plan. Three general methods of tailings deposition are typically recognized. Scale of tailings production is immense, since metal extraction is usually only ounces or pounds, for. According to their functions, dams serve three main purposes. Figure 2 shows a simplistic diagram of the stages of construction of an upstream raised embankment. 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.
Submarine deepsea tailings deposition is an alternative method of the landbased minewaste disposal, whereby mineral ore. Beaching angles and evolution of stack geometry for thickened. Tailpro consulting works with specialist international consultants to provide an integrated solution. Tailings model that allow for subaerial deposition of tailings. Kari skirbekk and beata sternal, and one professor ii. The zoning of the tailings deposit into sandy, intermediate and slime zones is based on in situ vane. Goldsim is a probabilistic simulation and modelling software package that has. 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. Investigation of the use of mine tailings for unpaved road. But how can we do this quickly without software like muck 3d and vulcan. 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 the extraction of minerals from ore can be done two ways. Pseudo 3d deposition and largestrain consolidation modeling.
It is therefore essential that while investigating the properties of tailings that the physical characteristics and material parameters e. Study on the risk assessment of the tailings dam break. If shouyun heshangyu tailings dam break, sand flow process line is shown in figure 2, after tailings dam break, tailings sand flow at several different moments is shown in figure 3. The surface deposition plan at the bulyanhulu site involves the deposition of a stable paste tailings stack using endofpipe discharge from multiple deposition towers. Multiple deposition nodes, deposition lines or deposition paths. Models can be run either as capacity depositing from known elevations or volume driven deposit known volume and determine beach elevation. Mine tailings disposal is therefore a critical issue for any mine project and must be thoroughly studied before the most suitable solution of each case is found. Abstract similarities are noted in the practices and problems of constructing dams to impound mine tailings fly ash and chemical wastes. They are the largest source of the 183 identified tailings deposits in the. This results in a steeper beach that allows tailings to be stored in increased thickness within the available storage area. Paul and his company, australian tailings consultants, have sponsored this project. For conventional storage the tailings are generally discharged from spigotsoutfalls located.
Dry stacking of tailings is normally carried out by a radial conveyor stacker or by truck davies and rice 2001. Who we are royal ihc market leader in integrated vessels, advanced equipment and lifecycle services for the dredging, offshore construction and wet mining markets headquarters in. 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. Rift software rift td tailings deposition modelling software. Tailpro resource an interactive tool aimed to improve tailings management and is designed to be used by industry, regulators, designers and operators involved with tailings storage. Pseudo 3d deposition and largestrain consolidation. Mine tailings deposition practices, liquefaction potential. Which method is best suited deposition of waste decided characteristics of the tailings materials, the deposition cycle, and the climate. The characterization of the water in upper strathcona tailings treatment system water showed that it was acidic ph 2. Potential environmental benefits and requirements for geochemical characterization rens b. Tailings can be discharged using subaqueous below water or subaerial techniques above the water line, on the ground or on the tailings beach dpi 2003.
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. The remaining functions are tools to assist in the. Today, software piracy is an issue of global importance. May 30, 20 deepsea mine tailings placement dstp is an alternative to landbased minewaste disposal, whereby mineral ore is converted into slurry and transported via a pipeline to processing plants. The tailings are usually discharged from the top of the dam crest creating a beach that becomes the foundation for future embankment raises vick 1990. The first method which i would like to introduce is single point discharge. Oil sands mining operations generate large quantities of fine tailings that can take many years to consolidate into solid ground under normal environmental conditions. Wolverine project tailings facility operation, maintenance and surveillance manual v201001 yukon zinc corporation july 2010 1 1 introduction this wolverine project operation, maintenance and surveillance oms manual is a requirement of quartz mining license qml0006 qml part. 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. Tailings are the materials left over after the process of separating the valuable fraction from the uneconomic fraction of an ore. In conventional tailings deposition and dike cell construction, tailings slurry whole tailings or cyclone underflow is pipelined and discharged onto the beaches inside the dike or discharged into cells where dozers compact the material to form dikes. Now you need to grade all of your lines to your desired tailings beach. Leading practice in tailings planning for highthroughput mining.
Chapter 11 design and construction of tailings dams. We created a guide on what software piracy is, types or software piracy and the dangers they present. Wide client base in tailings related projects in base metals, precious metals, and oil sands. Mcphail, metago engineering, australia abstract the reliable prediction or management of beach slope and stack geometry is integral to realization of the. Surface disposal of past tailings at the bulyanhulu gold. 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. The principal function is the model tailings function, which does the work of building the final surface. Tailings definition of tailings by medical dictionary.
Mine tailings are the ore waste of mines, and are typically a mudlike material. Tailings management responsible management of the worlds resources is key to enabling a sustainable future for us all. Aerial photographs proved to be useful for confirmation of the location of the tailings discharge points. In a few cases, tailings are deposited underwater subaqueous which generates a higher settled slope than subaerial deposition due, it is thought, to the higher. Reduced viscosity associated with the underflow concentrations of the hidensity thickener results in lower pumping costs an important factor for deposition areas far from the plant. Two postdoc focusing on deposition of mine tailings and drill cuttings, sedimentology and foraminifera. These filtered tailings are normally transported by conveyor or truck, deposited, spread and compacted to form an unsaturated tailings deposit davies and rice 2001.
Tailings is a combination of the finegrained typically siltsized, in the range from 0. Water savings and tailings deposition can be accomplished with fewer tanks and at a lower capital cost than with the equivalent number of deep bed paste thickeners. Computer science students are the future information and communication technologies professionals. The application will calculate total volume for an individual cycle. Icmm is committed to strengthening the social and environmental performance of the mining and metals industry to deliver the materials essential for human progress in a responsible way. Aug 24, 2015 tailings remediation with dredge mining technology bart hogeweg andrina drost 2. Conventional tailings thickened tailings paste cake increasing solids concentration fully sheared yield stress. This is a very important development for the maritime. The engineering characteristics of tailings are in most instances influenced by the degree of thickening and the method of deposition. Chapter 11 design and construction of tailings dams authorstream. Tailings characteristics can vary greatly and are dependent on the ore mineralogy together with the physical and chemical processes used to extract the economic product. Proceedings tailings and mine waste 2015 vancouver, bc, october 26 to 28, 2015 pseudo 3d deposition and largestrain consolidation modeling of tailings deep deposits murray fredlund, matt donaldson, krishna chaudhary soilvision systems ltd abstract the design of deep deposits requires the numerical modeling of largestrain consolidation to.
Goldtail tailings modeling software incorporates consolidation. Tailings are sometimes over or underestimated, excluded, or incorrectly reported. The tailings would first be thickened to reduce water content going into the impoundment. The methodology is outlined in the paper and its utilization in a typical case study is examined. Dewatering of oil sands tailings with an electrokinetic. Desiccation contributes to strength but excess desiccation is a concern in sulphidic tailings due to the possibility of oxidation and acid rock. In my presentation i would like to introduce main operatings, types and applications tailings dams. The use of planar electrokinetic geocomposites egcps in fft disposal areas could improve insitu dewatering by allowing water to drain after it is expulsed during consolidation and by permitting the use of electroosmosis eo to displace a significant. Tailings are transported to the tailings storage facility tsf at a flow rate of 233 m3h and. The oil sands industry generates large quantities of mineral waste, such as fluid fine tailings fft, whose disposal is often challenging. Tailings dams are also fundamentally different from water supply dams in several respects. As the polymertreated tailings are discharged from the pipeline, the large and small suspended particles in the tailings segregate quickly from the water, and the water drains away. Pettersen asplan viak and one postdoc shared with wp 1.
The lowdensity tailings disposal system is shown in figure 2. Beaching angles and evolution of stack geometry for thickened tailings. Tailings deposition modelling software for tailings dam consultants, designers and operators. Tailings are transported to the tailings storage facility tsf at a.
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