Consolidation and shear strength of coal tailings slurries

Shriful Islam

Worldwide production of black coal amounts to about 8 billion tonnes. Perhaps 20% of this annual production is washed to improve its quality, generating perhaps 250 million tonnes of coal tailings annually,…

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Starter dyke optimisation with Muk3D and GoldSim

Carlo Cooper

The sizing of a starter dam for a Tailings Storage Facility (TSF) involves balancing many competing demands.  It should cost as little as possible, be high enough to store tailings…

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Water balance management 101

Chris Lane

Managing water is a key aspect of mining, whether a site is in water surplus or water deficit.   Water in tailings storage facilities (TSFs) needs to be managed carefully to…

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Improving the dewatering efficiency of clay–rich tailings in saline water

Di Liu

The presence of clay minerals slows down the settling rate and mitigates compact consolidation efficiency in tailing dewatering. The increasing use of saline water in many plants affects the dewatering…

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Excess pore water pressure induced during tailings run-out

Marcelo Llano-Serna

Tailings dam failures continue to happen worldwide at an unacceptable rate, averaging two events annually over the last 100 years. Furthermore, tailings dams continue to grow in size, increasing the…

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Risk-based approach for minimising tailings dam failures

Hongyu Li

The total number of tailings accidents has reduced from over 50/decade in the 1960s-1980s to less than 30/decade in the 2000s to 2010s.  However, the rate of significant tailings dam…

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Importance of the simple shear loading direction to the stability of tailings

David Reid

The engineering properties of soils and tailings often exhibit significant anisotropy.  One area where this has been well documents is undrained shear strength.  Materials sheared in directions close to the…

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Predicting changes in static liquefaction susceptibility using cone penetrati...

Mark Styler

Flow liquefaction is a geotechnical hazard in mine tailings facilities.  Soil states that are contractive, or loose of the critical state line, are susceptible to flow liquefaction.  Tailings facilities are…

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Linking safety factor to probability of failure

Scott Gover

Estimating the probability of failure for embankments is not intuitive. It requires not only an appreciation of the strength of the embankment, but an understanding of the variability and uncertainty…

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Instrumented column testing of salt uptake from compacted red mud into a cover

Chenming Zhang

A cover of inert material overlain by topsoil is proposed over compacted, seawaterneutralised red mud, a waste product from the refining of bauxite to produce alumina, at Queensland Alumina Limited…

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Shear strength of compacted clay liner at McArthur River Mine

David Williams

Shear strength parameters of compacted clay liners (CCLs) are needed to analyse the stability of mine waste dumps containing CCLs as sealing layers for potentially acid forming waste rock. A…

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The importance of rate of rise in life of mine planning of an upstream raised...

Peter Chapman

This paper presents a case study illustrating the importance of rate of rise in the life of mine planning of an upstream raised tailings storage facility (TSF) in Western Australia. …

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Material handling testing and control system requirements for dry stack tailings

Ken Rahal

The challenges of increasingly scarce water resources and the risk of dam failures has seen the mining industry turn to sustainable tailings management solutions such as dewatering and dry stacking….

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Geotechnical behaviour of spent ore – impacts of metallurgical factors

Rigo Rimmelin

Heap leach pads are composed of mined ore, usually crushed, disposed on liners to be processed with leach solutions, and the tail of the process is called “spent ore” which…

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Spontaneous combustion hazard assessment of McArthur River Mine waste rock

Basil Beamish

The presence of reactive pyrite in waste rock contributes to the hazard of spontaneous combustion in emplacement facilities as it acts as an initiator of self-heating at low ambient temperatures….

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Surface and groundwater monitoring and seepage control at the Sungun Copper Mine

Farshad Rashidi-Nejad

Mine tailings represent one of the two largest sources of mine waste from the minerals industries (the other being waste rock). Given the problems of declining ore grades and growing…

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Tailings regulation: a South Australian perspective

Greg Smith

The South Australian mining regulatory framework has adopted a risk, outcomes and performance based approach, which has been in place for more than 10 years. This approach to regulation is…

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Optimisation of surface tailings storage and tailings backfill – a case study

Nils Steward

A revised backfill design was prepared and implemented at a gold mine in China to address issues of quality control of backfill to underground workings and accelerated filling of the…

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Optimum embankment design for a tailings dam

Behrooz Ghahreman-Nejad

This paper discusses the method and results of an options study into selection of the optimal form for a 130 m high tailings/water retaining dam, located in a region of…

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Tailings process optimisation through automation and controls integration

Michael Baxter

The purpose of this paper is to discuss the efficient operation of a tailings dewatering circuit comprising a thickener and filter press through proper control and automation.  It is common…

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Five years of cover performance monitoring and modelling for a store and rele...

Pascal Defferrard

In 2010 a store and release cover (the cover) was constructed on the south waste rock dump (SWRD) at Century mine. The purpose of the cover is to reduce percolation…

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Making use of potentially contaminating mine waste in cover design

Timothy Rohde

The Mine is an underground zinc (Zn), lead (Pb) and silver (Ag) operation in central New South Wales (NSW). Broadly speaking the Mine has two domains that require rehabilitation, the…

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Geomembranes – from design to handover, the lessons learnt

Attila Marta

Geomembrane liners (GMB) are being used more frequently for the storage or capping of mine waste due to stricter regulatory requirements relating to environmental protection.   The longevity of any liner…

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Assessing the volume change behaviour of red mud through laboratory and field...

Ali Shokouhi

Storage of the Red mud as a fine-grained waste generated during production of alumina from bauxite has detrimental impacts on the environment. Thus investigating the potential reuse of the red…

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The development of soil water characteristic curves for soils types classifie...

Ken Mercer

The soil-water characteristic curve (SWCC) is one of the most essential soil properties in unsaturated soil mechanics. The water flow and storage characteristics of an unsaturated soil are closely related…

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Liquefaction behaviour of tailings under cyclical simple shear testing

Allen Li

The behaviour of the tailings under cyclic loadings will have an impact on the stability and deformations of tailings dams and a good understanding of the cyclic behaviour of the…

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Characterisation of pore pressure in a tailings dam and the implications for ...

David Johns

This paper discusses pore pressures in the embankments of tailings dams by comparing real world data with common design assumptions. Assessment of pore pressures has implications on material behaviour interpretation…

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Segregating tailings: effects on density and water retention

Keith Seddon

Segregation of tailings on deposition can occur as a result of a) sub-aqueous deposition, and b) sub-aerial deposition at lower solids concentrations (i.e. when the solids concentration is less than…

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Potential improvement of tailings geotechnical behaviour using bacteria

Hernan Cifuentes

Despite the recognised importance of tailings management, there remain little data on the potential benefits of biological treatments compared with physical and chemical treatments. The operation of the majority of…

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Plant rejects disposal strategies applied at Caval Ridge open cut coal mine

Jianping Li

Caval Ridge Mine (CVM) is one of the newly established open-cut coal mines of BHP in Queensland, where no tailings dam was allowed to be built to minimise environmental impacts…

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A waste fines cell with a multitude of coincidental activities

Johan Boshoff

This iron ore mine site, located in the Pilbara region of Western Australia, commenced operations in 1998, with ore derived by mining of open-cut pits in Channel Iron Deposits (CIDs)….

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Consolidation and shear strength testing and stability analysis of coal mine ...

Timothy Vangsness

The flooding of open strip coal mines in the Bowen Basin and Hunter Valley Coalfields of Eastern Australia has the potential to soften the spoil and floor materials to produce…

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Optimisation of constant rate of loading slurry consolidometer testing of fin...

Shriful Islam

Fine-grained coal tailings slurry undergo only limited settling and self-weight consolidation, and tend to remain slurry-like and unsuitable for conventional laboratory consolidation testing. In addition, constant rate of loading consolidation…

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Accelerated degradation and modified slake durability testing of clay mineral...

Timothy Vangsness

The flooding of open strip coal mines in the Bowen Basin and Hunter Valley Coalfields of Eastern Australia has the potential to soften the spoil and floor materials to produce…

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PanAust Limited’s approach to mine waste and tailings stewardship

Peter Trout

PanAust Limited (PanAust) has constructed and commissioned two mining operations in Laos over the past decade and undertaken major studies for three new mine developments.  Mine waste and tailings management…

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The challenges of the reuse of tailings and overburden

Lais Resende

The tailings are waste from mineral processing operations. The tailings of iron ore processing are classified into sandy tailings and sludge. Already the overburden are showing significant levels of useful…

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Former metal mining areas in England and Wales: local residents’ preferences ...

Danielle Sinnett

This study uses the Q Method to examine how those living in former metal mining landscapes value this heritage and their preferences for the long-term management of mine waste. Such…

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Robust construction and quality assurance culture for tailings storage facili...

Anjan Kundu

After multiple tailings dam failures in recent times, the owner organisations have made efforts to step up the governance systems to industry best practise in terms of the design and…

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Experience with capping of tailings storage facilities for decommissioning pr...

Wade Ludlow

A 100 hectare Tailings Storage Facility in the Northern Territory recently reached full capacity and was scheduled for decommissioning.  This paper presents an overview of the design and construction challenges…

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Lessons learnt in geotechnical investigation and stability analysis for upstr...

Benoit Wentzinger

Upstream embankment raises often represent the lowest cost option for increasing the capacity of tailings storage facilities (TSF), but also pose the highest stability risk due to constructing on top…

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