On the Need for Polyhedral Representation of Blocky Rock Masses

Authors: Elmouttie, M; Poropat, GV; Guest, A

DOI https://doi.org/10.36487/ACG_repo/808_122

Cite As:
Elmouttie, M, Poropat, GV & Guest, A 2008, 'On the Need for Polyhedral Representation of Blocky Rock Masses', in Y Potvin, J Carter, A Dyskin & R Jeffrey (eds), SHIRMS 2008: Proceedings of the First Southern Hemisphere International Rock Mechanics Symposium, Australian Centre for Geomechanics, Perth, pp. 433-446, https://doi.org/10.36487/ACG_repo/808_122

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Abstract:
Modelling rock mass structure accurately requires the determination of what degree of accuracy is needed for the rock mass model. Structural modelling requires approximations with respect to the geometry and other characteristics of the discontinuities or fractures present. Not only are there uncertainties with respect to the fracture characteristics as measured in the field, but the method of representation of these structures in a model is also subject to judgement. Model simplification must be guided by the principle of retaining the critical characteristics of the rock mass being investigated. Of all the structural modelling techniques currently available, the use of polyhedral modellers has recently received considerable attention. This paper will discuss the benefits of modelling rock using a polyhedral representation based on finite persistence discontinuities. In particular, the predictions of such a model with respect to stability analysis, rock mass characterisation and excavation analysis will be compared to the more traditional techniques that have been used.

References:
Baecher, G.B. and Einstein, H.H. (1977) Statistical description of rock properties and sampling. 18th US Symposium on Rock Mechanics, Colorado School of Mines, Golden CO, Johnson Publishing Company.
Cundall, P.A., Potyondy, D.O. and Lee, C. (1996) Modeling Rock Using Bonded Assemblies of Circular Particles. Rock Mechanics Tools and Techniques. Proceedings Second North American Rock Mechanics Symposium, Montréal, June 1996, pp. 1937–1944.
Dershowitz, W.S. and Einstein, H.H. (1988) Characterizing Rock Joint Geometry with Joint System Models. Rock Mechanics and Rock Engineering, 21, pp. 21–51.
Dershowitz, W.S. and Herda, H.H. (1992) Interpretation of fracture spacing and intensity. 33rd US Symposium on Rock Mechanics, Rotterdam, Balkema, pp. 757–766.
Gibson W.H., de Bruyn, I.A. and Walker, D.J.H. (2006) Considerations in the optimisation of bench face angle and berm width geometries for open pit mines. Stability of rock slopes in open pit mining and civil engineering situations, SAIMM Symposium Series S44, 3–6 April, pp. 557–578.
Goodman, R.E. and Shi, G. (1985) Block Theory and its Application to Rock Engineering, Prentice Hall New Jersey.
Goodman, R.E., Taylor, R.L. and Brekke, T. (1968) A model for mechanics of jointed rock. Journal of Soil Mechanics and Foundations Division ASCE 94(SME3), pp. 637–659.
Jern, M. (2004) Determination of the In Situ block size distribution in fractured rock, an approach for comparing in-situ rock with rock sieve analysis. Rock. Mech. Rock. Eng., Vol. 37 (5), pp. 391–401.
Jing, L. (2000) Block system construction for three-dimensional discrete element models of fractured rocks. Int. J. Rock Mech. Min. Sci., 37, pp. 645–659.
Latham, J-P., Van Meulen, J. and Dupray, S. (2006) Prediction of in-situ block size distributions with reference to armourstone for breakwaters. Eng. Geology, pp. 18–36.
Lin, D., Fairhurst, C. and Starfield, A.M. (1987) Geometrical identification of three dimensional rock block systems using topological techniques. International Journal Rock Mechanics Mining Sciences and Geomechanics Abstracts., 24, No. 6, pp. 331–338.
Lu, J. (2002) Systematic identification of polyhedral rock blocks with arbitrary joints and faults, Computers and Geotechnics, 29, pp. 49–72.
Lu, P. and Latham J-P. (1999) Developments in the Assessment of In-situ Block Size Distributions of Rock Masses. Rock Mechanics Rock Engineering, 32(1), pp. 29–49.
Maerz, N.H. and Germain, P. (1996) Block size determination around underground openings using simulations. Proceedings FRAGBLAST 5 Workshop on Measurement of Blast Fragmentation, Montréal, Quebec, Canada 23–24 August, pp. 215–223.
Pierce, M., Cundall, P., Potyondy, D. and Mas Ivars, D. (2007) A synthetic rock mass model for jointed rock. Rock Mechanics: Meeting Societies Challenges and Demands, 1st Canada-US Rock Mech. Symposium, Vancouver, pp. 341–349.
Ruppert, J. and Seidel, R. (1992) On the difficulty of triangulating three-dimensional non-convex polyhedra. Discrete Computational Geometry, 7, pp. 227–253.
Ryan, T.M. and Pryor, P.R. (2000) Designing Catch Benches and Interramp Slopes. Slope stability in surface mining W.A. Hustrulid, M.K. McCarter and D.J.A. Van Zyl (editors), pp. 27–38.
Warburton, P.M. (1981) Vector stability analysis of an arbitrary polyhedral rock block with any number of free faces. International Journal Rock Mechanics Mining Sciences and Geomechanics Abstracts, 18, pp. 415–427.
Windsor, C.R. and Thompson, A.G. (1996) Block theory and excavation engineering. Proceedings Second North American Rock Mechanics Symposium,, Montreal, Volume 2, pp. 1753–1760, Balkema, Rotterdam.




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