Authors: Veenstra, RL; Grabinsky, MW; Bawden, WF; Thompson, BD


DOI https://doi.org/10.36487/ACG_rep/1404_06_Veenstra

Cite As:
Veenstra, RL, Grabinsky, MW, Bawden, WF & Thompson, BD 2014, 'The use of numerical modelling to determine the stress within early age cemented paste used to backfill an underground stope', in Y Potvin & T Grice (eds), Proceedings of the Eleventh International Symposium on Mining with Backfill, Australian Centre for Geomechanics, Perth, pp. 97-111, https://doi.org/10.36487/ACG_rep/1404_06_Veenstra

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Abstract:
The determination of the in situ pressures within a backfilled stope is important for mines looking to move from a plug pour filling strategy to a continuous pouring strategy. This paper presents a methodology developed for the numerical modelling of these pressures. This paper presents the model design criteria, approach methodology, and the input parameters required. Included in the input parameter discussion is a description of the laboratory methods used for determining the input parameters. The results from the modelling of two case study stopes are presented and these results are compared to in situ instrumentation installed in these test stopes.

References:
Boumiz, A, Vernet, C & Tenoudjit, FC 1996, ‘Mechanical properties of cement pastes and mortars at early ages – evolution with time and degree of hydration’, Advanced Cement Based Materials, vol. 3, pp. 94-106.
Galaa, A, Grabinsky, MW & Bawden, WF 2012, ‘Characterizing stiffness development in early age cemented paste backfills with sand in a non-destructive triaxial test’, Proceedings of the 65th Canadian Geotechnical Conference.
Itasca Consulting Group, Inc. 2009, ‘FLAC3D: Fast Lagrangian Analysis of Continua in 3 Dimensions’, Version 4.0, Itasca Consulting Group, Inc., Minneapolis.
Thompson, BD, Grabinsky, MW, Veenstra, RL & Bawden, WF 2011, ‘In situ pressures in cemented paste backfill – a review of fieldwork from three mines’, in RJ Jewell & AB Fourie (eds), Proceedings of the 14th International Seminar on Paste and Thickened Tailings, Australian Centre for Geomechanics, Perth, pp. 491-504.




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