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In the tailings dam break process the tailings dam may have multiple collapses and instability [116] is will cause the above three stages to be recurring and the time
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Tailings dams are at last receiving the attention and focus they deserve It is a strange paradox that while the mining industry has made huge strides in integrating environmental and social governance ESG into key business decisions over the last 30 years it has only recently started to get to grips with the risks posed by its waste disposal sites in particular tailings storage
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The Kemess Mines Ltd 01 01 2024 The existing construction design by AMEC called for a kilometer wide rock dam to be built from the 1350 M elevation to the 1504 M elevation at a 1 slope by hauling over 30 million tonnes of non acid generating waste rock 7 kilometers from the open pit to the tailings dam which was highly realized an opportunity for cost reduction was possible if the dam could
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There are six fundamental types of tailings dams each constructed using different techniques Upstream Upstream The upstream method starts with the construction of a starter dam Tailings will naturally separate so that coarse material settles closest to the starter dam while liquid and fine material settles furthest away
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At present common tailings reprocessing methods include the following types 1 Flotation Process Flotation process can be used to process tailings containing borax zinc oxide apatite and other minerals
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These devices can be used to monitor total pressure in tailings dams They are built from two circular stainless steel plates that are welded together at their peripheries De aired glycol fills the annular space between these plates A closed hydraulic system is formed by connecting the cell to a transducer with a stainless steel tube
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There are three main types of tailings dams upstream downstream and centreline Upstream Tailings Dams Upstream tailings dams are built progressively upstream of the starter dam by incorporating tailings materials into the dam for support through the controlled deposition or spigotting of tailings
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The tailings dam seems sound for the moment but may become an issue in the years to come Communities live downstream from both the pit and tailings dam and allegations of pollution are routine The risk register process raises the requirement for information about water and associated geology from various sources
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The Global Industry Standard for Tailings Management GISTM [2] is one of the globally recognized standards created to provide a framework for safe tailings management over all phases of a Tailings Storage Facility s lifecycle These phases include Project conception planning and design Initial construction
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Tailings are what remains after extracting valuable minerals and metals from mined ore and usually take the form of a liquid slurry comprising crushed rock water trace quantities of metals and additives used in processing such as petroleum by products sulfuric acid and cyanide
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The Department of Toxic Substances Control DTSC is in the process of approving the Argonaut Mine Tailings Site Feasibility Study/Remedial Action Plan FS/RAP for stormwater management immediately downstream of the Argonaut Dam proposed project site located in Jackson California The Proposed Project Site is located in the City of Jackson
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Billions of cubic meters of mine tailings are produced and processed annually Beyond the chemical dangers when a tailings dam collapse occurs the breach can lead to a host of other issues including potential fatalities socio economic consequences in surrounding communities business interruption revenue loss environmental contamination
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IMS has recently released a seismometer purpose built for monitoring of tailings dams the xPOD Furthermore IMS has demonstrated that ambient noise tomography can be used to image the internal structure of tailings dam walls The high resolution images can be used to determine the depth of the phreatic surface and to illuminate seepage
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In May 2024 Geotheta was appointed by Glencore Merafe Venture to design a new chromium Tailings Storage Facility TSF and Waste Rock Dump extension at Kroondal Mine near Rustenburg South Africa The TSF detailed design scope included near surface geotech investigation complete detailed design with construction drawings Bill of Quantity and
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Tailings reprocessing based on a proper geometallurgical evaluation will be able to Potentially allow conversion of currently uneconomic deposits and tailings are future ore into viable economic operations Allow optimisation of the project from the viewpoint of energy consumption carbon footprint and final project value
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Delivering ULTRA HD quality distributed temperature strain and acoustic measurements in real time the system offers early alerts of potential problems minimizing the risk of dam failures Solution/System Principle of Operation Fully automated in situ monitoring system with remote access Benefits Case Study Seepage detection based dam
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Tailings are the fine grained residue of mineral processing Their volume usually exceeds the volume of the recovered minerals by several orders of magnitude Because they contain large amounts of water they must be stored behind embankments called tailings dams
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Our approach to TSF failure risk management at operated assets is multi dimensional encompassing both management of controls and governance The key elements of this are maintenance of dam integrity operation surveillance and maintenance emergency preparedness and response TSF governance and standards Group level oversight and assurance
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Paste thickening is different than conventional thickening Specifically it integrates critical parameters in the thickening pumping and disposal of tailings to handle the yield stress Managing paste thickener tailings provides benefits such as improved water recovery and dam safety as well as more effective reclamation/re vegetation
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Tailings most often in the form of a wet slurry are conventionally stored above ground behind earthen dams There is no comprehensive global registry of tailings dams It is estimated there are around 18 000 dams 3 500 of which are active However that number may be much higher For example China alone has more than 12 000 tailings dams
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Tailings are the resulting material from finely ground processed ore bearing rock that has been through several sizing grinding and processing steps Tailings are discharged as dense slurry into containment areas known as tailings storage facilities TSF or through deep sea tailings placement DSTP in suitable deep ocean locations
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Tailings is a common by product of the process of extracting valuable minerals and metals from mined ore They usually take the form of a liquid slurry made of fine mineral particles created as mined ore is crushed ground and processed Effective tailings management is integral to the safe and sustainable production of metals and minerals
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Tailings Dams are typically an earth fill embankment dam storing mine by products generated during operations Tailings can be liquid solid or a slurry of fine particles and can be inert or toxic Stability of these structures should be monitored to determine movement vertical or horizontal increases in pore water pressure or seepage
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At Metso we have conducted studies recently that tell us that processing one unit of tailings could be three times more cost effective than virgin material A standard method of reprocessing involves dragging tailings from an existing dam back to the concentrator and using required mineral processing solutions to liberate the valuable metals
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Our tailings storage facilities TSFs are engineered structures designed and constructed to hold mineral waste tailings from our processing facilities We design construct and manage TSFs in compliance with all host country regulations and where applicable any additional requirements consistent with our management standards and framework
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the following points are the reasons why tailings dams are more susceptible to damage than other types of water storage structures 1 embankments constructed with soil coarse waste and residual materials from the mining operations 2 the number of wastewater increases as the height of the tailings dam increases 3 lack of reasonable …
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Tailings dams have been used for over a hundred years and are the most common disposal system for mining waste having really taken off in the second half of the 20 th century as technology improved They enable large scale and long term storage of waste from the mineral extraction process explains Butler
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Design and Evaluation of Tailings Dams 2 More recently concerns have been raised about the stability and environmental performance of tailings dams and impoundments Stability concerns are raised in part by the use of tailings material in tailings dams/embankments to mitigate these concerns such embankments often rely on a certain amount of
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Tailings dams differ from water supply reservoir dams in two significant ways—dam life design and dam construction design because saturation is the best way to limit oxygen and minimize the acid generation process Even if tailings dams were designed to be free draining it is likely there would be some residual level of saturation the
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What are Tailings Tailings are a by product of mining After ore containing an economically recoverable commodity is mined from the earth that commodity is extracted in a processing plant or mill After the commodity of value is extracted from the ore material the resultant waste stream is termed tailings
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