Validation of computational liquefaction for tailings: Tar Island …
The compacted fill used tailings that were sluiced into cells, 500–700 m long by 30–90 m wide, parallel to the dyke axis; the cells were formed using dozer-push sand bunds 2–3 m high. The tailings were discharged at one end of the cell with a spillway box at the far end in turn discharging water and unsettled solids to the pond.
A conceptual cost comparison of alternative tailings …
this stud y, the esti mated powe r consump tion in kWh p er dry tonn e of f iltere d tailings i s 2.65, bein g 162% high er than the thic kened taili ngs option (1. 63 k Wh/t) and 24 % h igher ...
Research Status and Prospects for the Utilization of Lead–Zinc Tailings ...
This paper reviews the progress of utilizing lead–zinc tailings as building materials and mainly summarizes the status of lead–zinc tailings in cement, geopolymer, concrete, building brick ...
Seaborg Technologies: Derfor er vores a-kraft sikker
Hvad er status på procestrrinnene, er de gennemprøvede, eller er det noget man regner med at have 12 år til på bagkant efter kritikalitet af første reaktor? ... så det sted må vel have hulrum nok til at holde materialet. Det kræver nogen planlægning, således det er muligt at replacere tailings i den anden ende af hullet hvor man ...
Iron Ore Tailings: Characterization and Applications
Currently, approximately 1.4 billion tons per year of iron ore tailing wastes (IOT) are generated, mainly in Australia, Brazil, and China. This work describes the characterization and application ...
Water Management Considerations for Conventional Storage
A rotational slip occurred causing tailings from the upper impoundment to inundate the lower impoundment which eventually overtopped and failed (Davies 2001). Tailings escaped down the hillside engulfing the town of Stava claiming the lives of 269 people. Stava remains as one of the world''s worst tailings disasters in terms of loss of human life.
CHAPTER II
tailings facilities and their consequence of failure. While not exhaustive, it illustrates the enormous volume of tailings that need to be safely managed. In 2001 Davies reviewed tailings facility failures up to that time and observed that all were predictable in hindsight and could have been prevented during the design and/or operational phase.
Comparison of Environmental Impacts of Deep-sea …
With increasing metal prices and declining ore grades, new mines are getting larger and mine waste disposal and management have become more difficult, particularly from an environmental perspective. While …
Comparing HSS and NorSand constitutive models for modeling …
Recent failures of tailings dams have raised the interest of the mining industry in evaluating the risk of flow liquefaction. The standard practice involves using limit equilibrium analyses to ...
Geotechnical Properties of Mine Tailings | Journal of …
The tailings always contain heavy metals, toxic substances, and chemicals added during mineral processing, which may disperse into the environment and threaten public health. In addition, because of the small grain size and high water …
Tailings Management
The entire mining and tailings areas will be reclaimed when mining has finished. Reclamation of Alberta''s oil sands tailings is a progressive, ongoing process. Tailings ponds have a long life span and reclamation timeline. However, under the TMF, all tailings must be ready to reclaim within ten years of mine closure.
Gennembrud for fusionsenergi: Hvad betyder det for udviklingen …
Selvom stellaratornes præstationer er lavere, end hvad en tokamak kan opnå, betyder dens iboende stabilitet og lovende nylige resultater, at det er et seriøst alternativ. To forskellige scenarier for implementering af nuklear fusion sammenlignet med vind-, sol- og nuklear fission. (Graf: G. De Temmerman, D. Chuard, J.-B. Rudelle for Zenon ...
Takling, almindelig og spansk takling, hvad er det?
Sikkerhed er ekstremt vigtig når det gælder færden på vandet. Hvis du er langt fra land og tingene går galt, så kan der være langt til værkstedet, til proviantering og måske til redning. Derfor bør du altid foretage et omfattende forårstjek hvert år og almindeligt sikkerhedstjek af båd, hver gang, inden du stævner ud.
Tailings Surface Tailings Containment
Tailings stored on the surface are usually deposited within purpose built retaining embankments. Conventional impoundment storage is the most common and normally has higher embankments than thickened, paste and dry stack storage facilities. Embankments for conventional storage facilities are designed to retain tailings and water (Vick 1990 ...
Vedvarende energikilder | Hvad er vedvarende energi? Se her!
Der er både fordele og ulemper ved vedvarende energi. Men det er der jo ved alt. Og uanset hvad, så er vi nødt til at ændre retning, så vi kan redde jorden. Nogle af de vigtigste fordele ved vedvarende energi er: Miljøvenlig: Vedvarende energi er mere miljøvenlig og bæredygtig end fossile brændstoffer, da den ikke udleder drivhusgasser.
Hvad bruger man fossile brændstoffer til? – Energimuseet
Et produkt som plastik er for eksempel lavet af olie, og olie bruges ikke kun til at lave plastik. Olie er i dag det vigtigste brændstof til transport, og i USA udgør olie mere end 97 procent af den anvendte energi til biler og andre transportmidler. Kigger man på verdensplan ligger dette tal på cirka svimlende 90 procent.
Guidelines and recommendations on minimum factors of safety …
Within this context, this paper presents a contribution to the postulation of minimum factors of safety required for tailings dams'' slope stability analysis. A recent review and discussion of ...
AU Ecoscience
Den rest af den efterbehandlede malm, der bliver tilbage, kaldes ''tailings'' og deponeres på land, i en sø eller i havet. Forurening af miljøet fra minedrift er ofte knyttet til støvet, der dannes ved transport og knusning af malm, til brugen af kemikalier, der anvendes under udvindingen (fx cyanid), og til frigivelse af tungmetaller fra ...
Kina
Kina er et permanent medlem af FN''s Sikkerhedsråd, og landet spiller stadig en vigtig international rolle. I nærområderne ønsker Kina at fremme stabilitet, samarbejde og gode handelsforbindelser - samtidig med at de, med varierende held, forsøger at forsikre omverdenen om, at de har fredelige intentioner.
A biochar selection method for remediating heavy metal …
Approximately 390,000 abandoned mines across the US pose considerable, pervasive risks to human and environmental health; world-wide the problem is even greater. Lime, organic materials, and other amendments have been used to decrease metal bioavailability (e.g., Cd, Cu, Mn, Ni, Zn) in contaminated mine wastes and to promote plant community …
MANAGEMENT OF TAILINGS: PAST, PRESENT AND FUTURE
Tailings management is typically easier, at least physically, in dry climates, where advantage can be taken of desiccation (that is, drying by exposure to the wind and sun) to naturally dewater, …