Authors: Wates, JA; Rousseau, P; Shuttleworth, J


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Wates, JA, Rousseau, P & Shuttleworth, J 2006, 'Buyanhulu Mine (Tanzania) Paste Tailings Facility: Relating Physical and Geochemical Properties of Gold Tailings to Rate of Rise', in R Jewell, S Lawson & P Newman (eds), Paste 2006: Proceedings of the Ninth International Seminar on Paste and Thickened Tailings, Australian Centre for Geomechanics, Perth, pp. 157-167,

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Bulyanhulu Mine in Tanzania is an underground gold mine, located in a semi-arid climatic region where the net evaporation rate exceeds the rate of precipitation. In these regions, the unsaturated pore spaces in tailings, exist under suction pressures, which play an important part in determining engineering behaviour. Slow rates of deposition and consolidation are important in order to achieve the necessary shear strength and volumetric stability. The potential for Acid Rock Drainage (ARD) is also influenced by the geotechnical properties as pore water saturation and primary and secondary (crack) porosity are all important influences on the rate that oxygen can be transported to sulphide minerals, which are the cause of ARD. Geotechnical and geochemical properties were investigated in a 0.6 m layer of tailings. Drying tests were also done in three cylinders. Geochemical reactions were investigated through sulphur speciation tests and modelling with the PYROX sulphide oxidation model.

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