Authors: Fall, M; Nasir, O


Cite As:
Fall, M & Nasir, O 2010, 'Predicting the temperature and strength development within cemented paste backfill structures', in R Jewell & AB Fourie (eds), Proceedings of the Thirteenth International Seminar on Paste and Thickened Tailings, Australian Centre for Geomechanics, Perth, pp. 125-136.

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Abstract:
In this paper, a thermo–chemo–mechanical (TCM) model is developed and implemented into FLAC software for predicting the strength development and distribution within hydrating cemented paste backfill (CPB) structure, temperature development and distribution within the CPB structures, heat transfer between CPB structures and mine rock temperatures. The developed model is validated against results from laboratory (on CPB samples and small scale model) and field studies of CPB. The validation tests show good agreement between the predicted and experimental laboratory and field results. The developed tool is then used to simulate the performance of CPB structure in several practical cases of mine backfill operations. From the simulation results valuable information was gained regarding the strength and heat development within CPB structures, the optimal curing time of a given CPB structure, the effect of filling rate and stope geometry of the strength and heat development within CPB structures, the effect of mix design (e.g. %binder, water content, initial mix temperatures, tailings types) on the performance (mechanical, thermal) of CPB structures. The developed tool will contribute to more cost-effective and safer design of CPB structures.

References:
Annor A.B. (1999) A study of the characteristics and behaviour of composite backfill material, Doctor (Ph.D.) Thesis,
McGill University, Montreal.
Celestin, J.C. (2008) Performance properties of cemented paste tailings and paste fill barrier systems under various
thermal loading conditions, Master (M.A.Sc.) Thesis, University of Ottawa, 222 p.
Fall, M. and Nasir, O. (2009) Numerical modeling of the coupled thermo-chemo-mechanical response of cemented
paste backfill structures in deep mine temperatures conditions, In Proceedings 3rd Canada-USA Rock Mechanic
Symposium and 20th Canadian Rock Mechanic Symposium, [CD-Rom].
Fall, M., Benzaazoua, M. and Ouellet, S. (2004) Experimental characterization of the influence of tailings fineness and
density on the quality of cemented paste backfill, Mineral Engineering, Vol. 18, pp. 41–44.
Fall, M., Nasir, O. and Célestin, J. (2007) Paste backfill responses in deep mine temperature conditions, In Proceedings
9th International Symposium of Mining with Backfill, Montreal, Canada.
Fall, M., Benzaazoua, M. and Sae, E. (2008) Mix proportioning of underground cemented paste backfill, International
Journal of Tunnelling and Underground Space Technology, Vol. 23, pp. 80–90.
Fall, M. and Samb, S. (2006) Influence of curing temperature on strength, deformation behaviour and pore structure of
cemented paste backfill properties at early ages, Construction Building Materials,
.
Itasca Consulting Group (2005) FLAC Version 5.0, Fast Lagrangian Analysis of Continua, Third Edition, April 2005.
Kesimal, A., Yilmaz, E., Ercikdi, B., Alp, I. and Deveci, H. (2005) Effect of properties of tailings and binder on the
short-and long-term strength and stability of cemented paste backfill, Materials Letters, Vol. 59(28),
pp. 3703–3709.
Nasir, O. and Fall, M. (2009a) Modeling the heat development in hydrating CPB structures, Journal of Computer and
Geotechnics, Vol. 36, pp. 1207–1218.
Nasir, O. and Fall, M. (2009b) Coupling binder hydration, temperature and compressive strength development of
underground cemented paste backfill at early ages, Journal of Tunneling and Underground Space Technology,
Vol. 25, pp. 9–20.
Perron, R. (1996) Development of an equation for the uniaxial compressive strength of cemented paste mineral
materials containing reactive and non-reactive fines, Master (M.A.Sc.) Thesis, Laurentian University, Sudbury,
Canada.
Pokharel, M. (2008) Geotechnical and environmental response of paste tailings systems to coupled thermo-chemical
loadings, Master (M.A.Sc.) Thesis, University of Ottawa, Canada, 248 p.
Williams, T.J., Denton, D.K., Larson, M.K., Rains, R.L., Seymour, J.B. and Tesarik, D.R. (2001) Geomechanics of
Reinforced Cemented Backfill in an Underhand Stope at the Lucky Friday Mine, Mullan, Idaho, U.S. department
of Health and Human Services.
Yilmaz, E., Kesima, A. and Ercidi, B. (2004) Strength development of paste backfill simples at Long term using
different binders, In Proceedings 8th Symposium MineFill04, China, pp. 281–285.




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