Koupouli, NJF, Belem, T & Rivard, P 2017, 'Shear strength between cemented paste backfill and natural rock surface replicas', in M Hudyma & Y Potvin (eds), Proceedings of the First International Conference on Underground Mining Technology
, Australian Centre for Geomechanics, Perth, pp. 375-385.
After placement underground, the physical–chemical and mechanical properties of cemented paste backfill (CPB) will evolve over time due to self-weight consolidation and binder hydration. This paper deals with an experimental investigation into the shear strength behaviour of the CPB–rock interfaces using a direct shear machine. Numerous shear tests were conducted. The rock interfaces were made from two natural rock surfaces (schist and granite) in SikaGrout mortar replicas. Both frictional shear and shear bond strengths were determined. The results show that the shear strength at the schist interface (rougher) is higher than the one at the granite interface. The shear bond strength or cohesion and the interfacial angle of friction depend on the CPB curing time and the applied normal stress.
Keywords: cemented paste backfill, natural rock surface, shear strength, cohesion, angle of friction
Aubertin, M, Li, L, Arnold, S, Belem, T, Bussiere, B, Benzaazoua, M & Simon, R 2003, ‘Interaction between backfill and rock mass in narrow stopes’, in PJ Culligan, HH Einstein & AJ Whittle (eds), Proceedings of SoilRock2003: 12th Panamerican Conference on Soil Mechanics and Geotechnical Engineering and 39th U.S. Rock Mechanics Symposium, vol. 1, Verlag Glückauf GmbH, Essen, pp. 1157–1164.
Barret, JR, Coulthard, MA & Dight, PM 1978, ‘Determination of fill stability, mining with backfill’, Proceedings of the 12th Canadian Rock Mechanics Symposium, Canadian Institute of Mining and Metallurgy, Montreal, pp. 85–91.
Barton, NR 1973, ‘Review of a new shear strength criterion for rock joint deformation’, Engineering Geology, vol. 7, pp. 287–332.
Belem, T & Benzaazoua, M 2008, ‘Design and application of underground mine paste backfill technology’, Geotechnical and Geological Engineering, vol. 26, no. 2, pp. 148–174.
Belem, T, Benzaazoua, M & Bussière, B 2000a, ‘Mechanical behaviour of cemented paste backfill’, Proceedings of the 53rd Canadian Geotechnical Conference: Geotechnical Engineering at the Dawn of the Third Millennium, vol. 1, Canadian Geotechnical Society, Montreal, pp. 373–380.
Belem, T, Homand-Etienne, F & Souley, M 2000b, ‘Quantitative parameters for rock joint surface roughness’, Rock Mechanics and Rock Engineering, vol. 33, no. 4, pp. 217–242.
Belem, T, Benzaazoua, M, El-Aatar, O & Yilmaz, E 2013, ‘Effect of drainage and the pore water pressure dissipation on the backfilling sequencing’, Proceedings of the 23rd World Mining Congress, Canadian Institute of Mining, Metallurgy and Petroleum, Westmount, 10 p.
de Souza, E, Archibald, J & Beauchamp, L 2009, ‘Compilation of industry practices for control of hazards associated with backfill in underground mines - Part I surface and plant operations’, in M Diederichs & G Grasselli (eds), Proceedings of the 3rd Canada-US Rock Mechanics Symposium: RockEng09, Canadian Rock Mechanics Association, 12 p.
El Soudani, SM 1978, ‘Profilometric analysis of fractures’, Metallography, vol. 11, pp. 247–336.
Fall, M & Nasir, O 2010, ‘Mechanical behaviour of the interface between cemented tailings backfill and retaining structures under shear loads’, Geotechnical and Geological Engineering, vol. 26, no. 6, pp. 779–790.
Fourie, AB, Fahey, M & Helinski, M 2007, ‘Using effective stress theory to characterize the behaviour of backfill’, CIM Bulletin, vol. 100, no. 1103, pp. 1–9.
Indraratna, B & Jayanathan, M 2005, ‘Measurement of pore water pressure of clay-filled rock joints during triaxial shearing’, Geotechnique, vol. 55, no. 10, pp. 759–764.
Kodikara, JK & Johnston, IW 1994, ‘Shear behaviour of irregular triangular rock-concrete joints’, International Journal of Rock Mechanics and Mining Sciences Abstracts, vol. 31, no. 4, pp. 313–322.
Koupouli, NJF 2015, Comportement mécanique des remblais en pâte cimentés en compression et en cisaillement et étude du frottement aux interfaces remblai-remblai et remblai-roche, Master's thesis in mineral engineering, University of Quebec, Quebec, 222 p.
Koupouli, NJF, Belem, T, Rivard, P & Effenguet H 2015, ‘Direct shear tests on cemented paste backfill–rock wall and cemented paste backfill–backfill interfaces’, Journal of Rock Mechanics and Geotechnical Engineering, vol. 8, no. 4, pp. 472–479.
Landriault, DA & Tenbergen, R 1995, ‘The present state of paste fills in Canadian underground mining’, in FP Hassani & P Mottahed (eds), Proceedings of the 97th Annual General Meeting of the CIM Rock Mechanics and Strata Control Session, Canadian Institute of Mining, Metallurgy and Petroleum, Westmount, pp. 229–238.
Landriault, DA, Verburg, R, Cincilla, W & Welch, D 1997, ‘Paste technology for underground backfill and surface tailings disposal applications’, short course notes, technical workshop held on 27 April 1997, Canadian Institute of Mining and Metallurgy, Montreal, 120 p.
Le Roux, K-A, Bawden, WF & Grabinsky, MWF, 2005, ‘Field properties of cemented paste backfill at the Golden Giant mine’, Transactions of the Institution of Mining and Metallurgy, Section A: Mining Technology, vol. 114, no. 2, pp. 65–86.
Li, L, Aubertin, M & Belem, T 2005, ‘Formulation of a three dimensional analytical solution to evaluate stress in backfilled vertical narrow openings’, Canadian Geotechnical Journal, vol. 42, no. 6, pp. 1705–1717.
Manaras, S 2009, Investigations of Backfill – Rock Mass Interface Failure Mechanisms, master’s thesis, Queen’s University, Kingston.
Martson, A 1930, ‘The theory of external loads on closed conduits in the light of latest experiments’, Bulletin 96, Iowa Engineering Experiment Station, vol. 28, no. 38.
Mitchell, RJ 1989a, ‘Stability of cemented tailings backfill’, Computer and Physical Modelling in Geotechnical Engineering, A.A. Balkema, Rotterdam, pp. 501–507.
Mitchell, RJ 1989b, ‘Model studies on the stability of confined fills’, Canadian Geotechnical Journal, vol. 26, no. 2, pp. 210–216.
Mitchell, RJ, Olsen, RS & Smith, JD 1982, ‘Model studies on cemented tailings used in mine backfill’, Canadian Geotechnical Journal, vol. 19, no. 1, pp. 14–28.
Nantel, J 1998, ‘Recent developments and trends in backfill practices in Canada’, in M Bloss (ed.), Proceedings of the 6th International Symposium on Mining with Backfill: Minefill 1998, The Australasian Institute of Mining and Metallurgy, Melbourne, p. 11–14.
Nasir, O & Fall, M 2008, ‘Shear behaviour of cemented pastefill-rock interfaces’, Engineering Geology, vol. 101, no. 3–4, pp. 146–53.
Potvin, Y, Thomas, E & Fourie, A (eds) 2005, Handbook on Mine Fill, Australian Centre for Geomechanics, Perth.
Terzaghi, K 1943, Theoretical Soil Mechanics, John Wiley & Sons, Inc., New York.