Venter, J & Hamman, ECF 2020, 'A practical rockfall risk model for open pit mines using the time–space concept', in PM Dight (ed.), Proceedings of the 2020 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering
, Australian Centre for Geomechanics, Perth, pp. 1163-1172, https://doi.org/10.36487/ACG_repo/2025_77
A number of papers have recently dealt with the topics of economic risk and safety risk in open pits based on larger scale instabilities with more latency (warning time). Rockfall is, however, a low latency failure mechanism and as such, requires separate treatment. This paper presents a practical approach to quantifying rockfall risk based on real measurable data, which allows the model to be calibrated over time. A model is presented that readers can apply in software such as Microsoft Excel and to demonstrate, a practical example is provided. The practical example quantifies the risk for a real slope with and without controls, and demonstrates how factors such as rockfall fences, batter berm configurations, personnel exposure and vehicles can be accounted for to optimise slope design.
Keywords: rockfall risk model, safety, exposure, personnel risk, vehicular risk, time–space
Basson, F 2019a, Trajec3D, version 1.8.3, computer software, Basrock, Perth, www.basrock.net
Basson, F 2019b, GEM4D, version 1.7.2, computer software, Basrock, Perth, www.basrock.net
Fruin, J & Benz, G 1984, Pedestrian Time–Space Concept for Analyzing Corners and Crosswalks, Transportation Research Board 959, Washington DC,
Hamman, ECF, du Plooy, DJ & Seery, JM 2017, ‘Data management and geotechnical models’, in J Wesseloo (ed.), Proceedings of the Eighth International Conference on Deep and High Stress Mining, Australian Centre for Geomechanics, Perth, pp. 461–487, https://doi.org/10.36487/ACG_rep/1704_33.2_Hamman
Harr, M 1987, Reliability-Based Design in Civil Engineering, Dover Publications, New York.
Hoek, E 2007, Practical Rock Engineering, Rocscience Inc., Toronto, viewed 3 March 2020,
Lateltin, O 1997, Dangers naturels: Recommandations 1997: Prise en compte des dangers dus aux mouvements de terrain dans le cadre des activités de l'aménagement du territoire (1997 Recommendations: taking into account the dangers due to ground movements within the framework of spatial planning activities), Bureau Felix Frank, Berne,
Terbrugge, P, Wesseloo, J, Venter, J & Steffen, O 2006, ‘A risk consequence approach to open pit slope design’, Journal of the South African Institute of Mining and Metallurgy, vol. 106, pp. 503–511.
Venter, J & Hamman, E 2018a, ‘A temporal safety risk model for open pit slope management’, Proceedings of the 2018 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering, Asociacion Nacional De Ingenieros De Minas/Colegio Oficial De Ingenieros De Minas Del Sur, Seville.
Venter, J & Hamman, E 2018b, ‘Determining the optimum slope angle using an integrated mine planning approach’, Proceedings of the 2018 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering, Asociacion Nacional De Ingenieros De Minas/Colegio Oficial De Ingenieros De Minas Del Sur, Seville.
Wesseloo, J & Read, J 2009, ‘Acceptance criteria’, in J Read & P Stacey (eds), Guideline for Open Pit Slope Design, CSIRO, Collingwood, pp. 221–236.