Linero-Molina, S, Contreras, LF & Dixon, J 2021, 'Estimation of shear strength of very coarse mine waste', in PM Dight (ed.), SSIM 2021: Second International Slope Stability in Mining
, Australian Centre for Geomechanics, Perth, pp. 341-354, https://doi.org/10.36487/ACG_repo/2135_21
Evaluating the shear strength of mine waste rock containing particles of metric scale is challenging because commercial laboratory testing devices can only accommodate samples composed of particles a few centimetres in size. The shear strength empirical model of Barton & Kjærnsli (1981) is therefore frequently used to assess the non-linear shear strength of very coarse granular material for stability assessment of very high mine waste dumps. In this article, we discuss practical methods for collecting the information required as input to the model, and we also illustrate the implementation of deterministic and probabilistic approaches for estimating the shear strength of several waste materials from a banded iron formation located in the Pilbara region of Western Australia.
Keywords: shear strength, very coarse granular material, mine waste dumps
Barton, N 1973, ‘Review of a new shear-strength criterion for rock joints’, Engineering Geology, vol. 7, no. 4, pp. 287–332.
Barton, N & Kjærnsli, B 1981, ‘Shear strength of rockfill’, Journal of the Geotechnical Engineering Division, vol. 107, no. GT7, pp. 873–891.
Hawley, M & Cunning, J 2017, Guidelines for Mine Waste Dump and Stockpile Design, CSIRO Publishing, Clayton.
Hungr, O, Dawson, R, Kent, A, Campbell, D & Morgenstern NR 2002, ‘Rapid flow slides of coal mine waste in British Columbia, Canada’, in Catastrophic Landslides, (Ed. SG Evans), Geological Society of America, Boulder, CO, pp. 191–208.
Leps, TM 1970, ‘Review of shearing strength of rockfill’, Journal of the Soil Mechanics and Foundations Division, vol. 96, no. 4, pp. 1159–1170.
Linero, S, Contreras, LF & Dixon, J 2022, ‘Bayesian approach to improve the confidence of the estimation of the shear strength of very coarse mine waste using Barton’s empirical criterion’, Proceedings of ICSMGE 2022: 20th International Conference on Soil Mechanics and Geotechnical Engineering, Australian Geomechanics Society, St Ives, submitted for publication.
Ovalle, C, Linero, S, Dano, C, Bard, E, Hicher, PY & Osses, R 2020, ‘Data compilation from large drained compression triaxial tests on coarse crushable rockfill materials’, Journal of Geotechnical and Geoenvironmental Engineering, vol. 146, no. 9.
Renani, HR, Martin, CD, Varona, P & Lorig, L 2019, ‘Stability analysis of slopes with spatially variable strength properties’, Rock Mechanics and Rock Engineering, vol. 52, no. 10, pp. 3791–3808.