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2003
Wickland, B., Wilson, G. W., Johnson, G.
The settlement and drainage behaviour of co-mix, or mixtures of waste rock and tailings, are examined in a column study. Three co-mix profiles were observed for settlement, drainage, and pore water pressure response. A fourth profile with waste rock and no tailings was also observed for...
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2003
Williams, D. J., Jeffrey, J., Gilbert, L., Wilson, G. W., Panidis, C., Perry, B.
Prior to the commencement of mining, the acid rock drainage (ARD) potential of the waste rock to be produced by an open cut mining operation is assessed by a variety of techniques carried out on drill-hole samples. These include, among others, acid base accounting (ABA), net acid generation (NAG)...
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2003
Rykaart, E. M., Wilson, G. W., Currey, N., Ritchie, P.
Kidston Gold Mine in Queensland, Australia has a 310 ha tailings impoundment that has undergone final closure rehabilitation. Kidston Gold Mine evaluated their closure options for this low acid generating tailings impoundment, and due to a lack of cover soils and the cost of importing material,...
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2003
Fines, P., Wilson, G. W., Landrialt, D., Langetine, L., Hulett, L.
Engineered soil covers are used for final closure options for both waste rock and tailings disposal facilities. Currently, cover construction requires excavation of appropriate cover material from a nearby site. If no suitable materials are available, the mine operation may have to ship...
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2003
Wilson, G. W., Plewes, H. D., Williams, D., Robertson, J.
The co-mixing of tailings and waste rock involves the intimate blending of tailings and waste rock to create a new material (Co-Mix) with superior physical and hydraulic properties. The new material has a low hydraulic conductivity, low compressibility, high water retaining capacity and high...
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2003
Sjoberg Dobchuk, B., Wilson, G. W., Aubertin, M.
A desulfurised tailings cover was installed at the Detour Lake Mine in Ontario, Canada, to reduce oxygen penetration into the underlying sulfidic tailings. The cover ranges from one to 1.5 m in thickness and was intended to maintain high water saturation to reduce oxygen diffusion and consume...
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2003
Fines, P., Wilson, G. W., Williams, D. J., Tran, A. B., Miller, S.
A comprehensive field program was implemented to evaluate the internal structure and hydrology of two full-scale waste rock piles. The excavation of waste rock dumps for in-pit disposal at the two mine sites provided an opportunity to characterise the in situ properties of the dumps given...
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2003
Tran, A. B., Miller, S., Williams, D. J., Fines, P., Wilson, G. W.
This paper presents the results and findings of geochemical and mineralogical testwork conducted on samples collected from waste rock dumps at two mine sites, located in South Carolina, USA (Site 1) and Sudbury Ontario, Canada (Site 2). Important aspects of the relationship between the physical...
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2003
Williams, D. J., Currey, N. A., Ritchie, P., Wilson, G. W.
The design and rehabilitation of potentially acid forming (PAF) waste rock dumps is site specific, being a function, among other factors, of the rock types, the dumping and storage method employed, and the climatic setting. The ‘store and release’ cover system developed to manage acid rock...
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2003
Rehabilitation of tailings impoundments is one of the most challenging aspects in mine closure, as not only does the potential for producing leachate pose a challenge to the rehabilitation designer, but also other aspects such as stability and settlement must be considered. The water balance of a...