Upstream stacking of thickened tailings at Neves Corvo

Lopes, Roy; Bahia, Ricardo G.; Jefferies, M. G.; Oliveira, Mafalda

doi:10.36487/acg_rep/1504_40_lopes

Proceedings of the 18th International Seminar on Paste and Thickened Tailings 2015

DOI: 10.36487/acg_rep/1504_40_lopes

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Upstream stacking of thickened tailings at Neves Corvo

Roy Lopes¹,

Ricardo G. Bahia²,

M. G. Jefferies³

et al.

Abstract: Neves Corvo is a world-class underground copper-zinc mine located in the south of Portugal. The mine has been operating since 1988 by Somincor (Sociedade Mineira de Neves-Corvo SA), a wholly-owned subsidiary of Lundin Mining Corporation from Canada.

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2016

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Determining silt state from CPTu

ShuttleDawn

JefferiesMichael

2016

Geotechnical Research

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Tailings, produced when rock is crushed to recover metals, are normally discharged as slurry of predominantly siltsized particles into storage areas that are created using dams. These dams have a poor safety record with billions of dollars in damages over the past decade alone, making reliable engineering of silt an important economic and safety issue for the mining industry. Equally, engineering of silts is challenging, as understanding of soil behaviour relates mostly to 'sands' or 'clays'. Undisturbed silt samples suffer substantial densification between sampling, transfer to element test and reinstatement of in situ stresses. Hence, silts require a sand-like approach that combines laboratory tests on reconstituted samples with in situ cone penetration test (CPT) soundings. This paper presents calibrated spherical cavity expansion in a general critical-state soil model to simulate the CPT in silt. The developed methodology is numerical, accurately captures calibration data and allows determination of the in situ state parameter in silts from CPT data. A validation is presented for a large tailing impoundment using stacked thickened tailings. Open-source software implementing the methodology is provided on the journal website as supplementary material.

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Determining silt state from CPTu

ShuttleDawn

JefferiesMichael

2016

Geotechnical Research

Self Cite

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show abstract

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Upstream stacking of thickened tailings at Neves Corvo

Abstract: Neves Corvo is a world-class underground copper-zinc mine located in the south of Portugal. The mine has been operating since 1988 by Somincor (Sociedade Mineira de Neves-Corvo SA), a wholly-owned subsidiary of Lundin Mining Corporation from Canada.

Cited by 1 publication

References 4 publications

Determining silt state from CPTu

Determining silt state from CPTu

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