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Improved mine waste characterisation through static blended test work


Parbhakar-Fox, A and Fox, N and Hill, R and Ferguson, T and Maynard, B, Improved mine waste characterisation through static blended test work, Process Mineralogy 17 Programme, 20-22 March 2017, Cape Town, South Africa, pp. 1-23. (2017) [Non Refereed Conference Paper]

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Prediction of the geoenvironmental characteristics of mine waste materials typically relies on the static and kinetic testing of individual waste units. In reality, waste rock piles are heterogeneous landforms containing potentially-acid forming (PAF) units juxtaposed with non-acid forming (NAF) units. Despite this, predictive geoenvironmental testwork programs rarely characterise blends of waste materials. Through undertaking laboratory-based blended static testing and mineralogical assessments, a first insight into the leachate chemistry of a waste landform can be ascertained. This was tested using three waste units (Type A-alkaline, B-neutral and D- PAF; n= 31) obtained from the Savage River mine, Western Tasmania. Seven blend types (1- 7; n= 42) were prepared using different ratios of the individual waste types, and characterised by acid base accounting and mineralogical techniques. Blend types were NAF when a maximum of 20 % of Type D was used, with blend type 4 (90% Type A + 10 % Type D) the most inert when screened against ANZECC (2000) aquatic protection trigger values. This study demonstrates that through blended testing, opportunities exist to improve waste-rock handling practices and design NAF waste piles.

Item Details

Item Type:Non Refereed Conference Paper
Keywords:blending, mine waste, acid rock drainage, geoenvironmental, prediction
Research Division:Earth Sciences
Research Group:Geochemistry
Research Field:Exploration geochemistry
Objective Division:Environmental Management
Objective Group:Terrestrial systems and management
Objective Field:Evaluation, allocation, and impacts of land use
UTAS Author:Parbhakar-Fox, A (Dr Anita Parbhakar-Fox)
UTAS Author:Fox, N (Dr Nathan Fox)
ID Code:116197
Year Published:2017
Deposited By:CODES ARC
Deposited On:2017-05-03
Last Modified:2017-05-03

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