Cintolesi, C, Beale, G, Dowling, J, Kotze, J, Rowland, A & Mansell, S 2020, 'Anglo American framework for strategic dewatering plans', in PM Dight (ed.), Slope Stability 2020: Proceedings of the 2020 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering, Australian Centre for Geomechanics, Perth, pp. 1291-1304, https://doi.org/10.36487/ACG_repo/2025_88
(https://papers.acg.uwa.edu.au/p/2025_88_Cintolesi/)
Abstract: The increasing size and depth of open pits and underground workings, and the increasing regulatory constraints imposed on mining operations, mean that planning and implementation of the dewatering strategy must now form an integral part of the mining cycle. Anglo American, in conjunction with Piteau Associates, has developed a standardised strategic approach for use across its global mine sites. The dewatering program must incorporate both planning and operations, including (i) the required regulatory approval in a timely manner, avoiding over-commitments, (ii) dewatering ahead of mine operations, (iii) avoidance of non-delivery of ore and/or higher mining costs, (iv) achievement of pore pressure targets to meet slope design acceptance criteria, and (v) incorporation of the pit water into the site-wide water balance and management of risks. This paper describes the six identified key steps for strategic planning and implementation providing examples. It is consistent with the Large Open Pit (LOP) project guidelines (Beale & Read 2013).

Keywords: dewatering, depressurisation, pit slope water management