Horn, A & Thomas, EG 2014, 'Paste fill delivery/distribution failures – causes, costs and mitigation/prevention', in Y Potvin & T Grice (eds), Proceedings of the Eleventh International Symposium on Mining with Backfill
, Australian Centre for Geomechanics, Perth, pp. 243-247, https://doi.org/10.36487/ACG_rep/1404_18_Thomas
Paste fill formulations focus on use of treated mine/mill waste materials and a variety of additives to reduce the impact/costs of surface waste disposal and improve pertinent underground mining parameters, in the main cost, reserves recovery and local and regional ground stability. Cost of such additives must be optimised.
Mix and/or delivery mismanagement can result in costly pipeline and/or borehole blockages. Delays to production are the main cost impacts. Actual costs of pipeline/borehole clearance are of secondary importance.
This paper first describes paste fill preparation and delivery mechanisms and then various performance failure modes including disaggregation, in-void dilution and inappropriate slurry rheology. Topics considered include fill delivery reliability, adherence to specifications, mix formulation cost effectiveness and commercially available additives.
BASF Australia Ltd 2012, BASF Minefill Products Brochure, BASF Australia Ltd, Southbank.
Brown, R & Ahmed, I 2011, ‘Backfilling on a budget: low capital paste backfill injection for small mines or brownfield site remediation’, Proceedings of the 10th International Symposium on Mining with Backfill, ed. HG Ilgner, The Southern African Institute of Mining and Metallurgy, Johannesburg, pp. 35-40.
Cooke, R 2007, ‘Backfill pipeline distribution systems – design methodology review’, in F Hassani & J Archibald (eds), Proceedings of the 9th International Symposium on Mining with Backfill, Canadian Institute of Mining, Metallurgy and Petroleum, Westmount.
Goosen, P, Ilgner, H & Dumbu, S 2011, ‘Settlement in backfill pipelines: its causes and a novel online detection method’, in HG Ilgner (ed.), Proceedings of the 10th International Symposium on Mining with Backfill, The Southern African Institute of Mining and Metallurgy, Johannesburg, pp. 187-96.
Henderson, A, Revell, MB, Landriault, D & Coxon, J 2005, ‘Paste Fill’, in Y Potvin, EG Thomas & AB Fourie (eds), Handbook on Mine Fill, Australian Centre for Geomechanics, Perth, Western Australia.
Lea, FM 2004, ‘Chemical Action’, in PC Hewlett (ed.), Lea’s Chemistry of Cement and Concrete, 4th edn, Elsevier Ltd, Kidlington, Oxford.
Pretorius, PC, Mahlaba, JS, Nzotta, U & Hareeparsad, S 2011, ‘Fundamental research on brine-based fly ash pastes for underground disposal’, in HG Ilgner (ed.), Proceedings of the 10th International Symposium on Mining with Backfill, The Southern African Institute of Mining and Metallurgy, Johannesburg, pp. 21-8.
Thomas, EG, Nantel, JH & Notley, KR 1979, Fill Technology in Underground Metalliferous Mines, International Academic Services Limited, Kingston, Ontario.