The Application of ‘Paste Rock’ for Cover Systems in Mine Waste Management

Wilson, Gordon; Miskolczi, Jozsef; Dagenais, Anne-Marie; Smith, Quentin; Lanteigne, Lisa; Hulett, L.; Landriault, David

doi:10.36487/acg_repo/663_18

Cited by 2 publications

(3 citation statements)

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“…The benefit in ARD reduction lies in the concept of the reduction on oxygen diffusion rates. As discussed by Wilson et al (2006), it is well documented that a significant reduction in oxygen diffusion rates occurs when saturation values exceed 85%. There is a good opportunity for designers to also assess this possible benefit in filtered tailings facilities.…”

Section: Environmental Prizesmentioning

confidence: 96%

“…Ward Wilson and his colleagues have written extensively (see for example Wilson et al, 2006) on the environmental merits of homogeneously blended tailings and waste rock where the amount of tailings used just precisely fills the voids between the rock particles. This mixture is said to have the (static) shear strength characteristics of waste rock and the permeability characteristics of tailings.…”

Section: Environmental Prizesmentioning

confidence: 99%

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Considerations for tailings facility design and operation using filtered tailings

Ulrich¹,

Coffin²

2013

Proceedings of the International Seminar on Paste and Thickened Tailings

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The use of filtering technology has improved considerably during the past few years, and tailings disposal facilities using filtered tailings are becoming more and more commonplace. Where once this method was only deemed suitable for relatively small-scale operations, technological advances are now being realised for large-scale operators. Often this application appears to be, and in fact is, relatively simple and straightforward. As with other tailings preparation methods, the use of filtered tailings provides no inherent panacea for tailings placement. Designers are advised to adopt designs thoughtfully, using site-specific data, information and tailings properties to ensure the method is employed rationally and that the resulting facility designs are flexible enough to accommodate changes to presumed operational design criteria. Practical experiences with facilities where less than optimal performance was achieved are presented.

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Section: Environmental Prizesmentioning

confidence: 96%

Section: Environmental Prizesmentioning

confidence: 99%

Considerations for tailings facility design and operation using filtered tailings

Ulrich¹,

Coffin²

2013

Proceedings of the International Seminar on Paste and Thickened Tailings

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“…Therefore, we must consider the future handling of residual products more broadly. Wilson et al (2006) studied mine waste cover systems based on matching a blend of tailings, waste rock and slag to a moraine-like broad and even size distribution with 30% less than 40 µm, average and maximum particle sizes of about 1 mm and 10 mm, respectively. The term paste-rock was used with a small amount of water added to reach a suitable consistency.…”

Section: Introductionmentioning

confidence: 99%

Loop pumping tests of crushed rock mixed with thickened tailings

Wennberg¹,

Stalnacke²,

Sellgren³

2023

Paste 2023: 25th International Conference on Paste, Thickened and Filtered Tailings

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LKAB operates three mines in northern Sweden, where the climate is subarctic with an average temperature of about 0 o C. LKAB's long-term overall objective includes feasibility considerations of thickened or filtered tailings combined with waste rock co-disposal covering cyclic economy considerations and landscape forming. At the Kiruna underground mine, about 3.5 Mtonnes of tailings and 12 Mtonnes of waste rock are generated annually. Crushing to less than 30 mm is part of the sorting plant processing, and the rock is deposited in stockpiles while the tailings are pumped conventionally to water-holding impoundments.The aim is to indicatively test the pipeline pumping of paste-rock mixtures at solids concentrations by weight of over 85% to limit segregation and leakage during deposition in nearby old pit holes. A test was carried out at a paste thickener with direct access to fresh paste, which was mixed in a concrete mixer with crushed rock from the processing. A 38 m long loop with a pipeline inner diameter of 0.075 m was equipped with a concrete type of pump. Unfortunately, a second test in a larger pipe could not be carried out at the planned time. LKAB then had the opportunity to test a laboratory-scale concrete industry device, the sliding pipe rheometer, Sliper, developed to simulate concrete pipeline pumping frictional resistance in a 0.126 m diameter pipeline. Initial loop results with crushed rock particles of up to 10 mm with a rock-to-paste mass ratio R:P of 1.2:1 showed a pressure requirement of about 25 kPa/m at 0.

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The Application of ‘Paste Rock’ for Cover Systems in Mine Waste Management

Cited by 2 publications

References 0 publications

Considerations for tailings facility design and operation using filtered tailings

Considerations for tailings facility design and operation using filtered tailings

Loop pumping tests of crushed rock mixed with thickened tailings

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