Authors: Thoeni, K; Lambert, C; Giacomini, A; Sloan, SW; Carter, JP


DOI https://doi.org/10.36487/ACG_rep/1308_81_Thoeni

Cite As:
Thoeni, K, Lambert, C, Giacomini, A, Sloan, SW & Carter, JP 2013, 'An integrated approach for rockfall analysis with drapery systems', in PM Dight (ed.), Proceedings of the 2013 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering, Australian Centre for Geomechanics, Perth, pp. 1149-1159, https://doi.org/10.36487/ACG_rep/1308_81_Thoeni

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Abstract:
The rockfall hazard in mining environments needs to be rigorously managed in order to ensure safe mining operations, in particular when designing portal entries for punch longwalls. The installation of drapery systems is a common practice to mitigate the rockfall hazard at the base of highwalls. However, the hazard is not completely eliminated since blocks can still detach and fall in between the drapery and the highwall. This contribution shows how geostructural modelling and 3D rockfall analysis can be combined in order to accurately map and assess the rockfall hazard at the base of such highwalls. The study entails the estimation of the size distribution of unstable blocks and the simulation of their trajectories and velocities for highwalls without and with drapery. First, 3D photogrammetry is combined with discrete fracture network modelling in order to generate polyhedral models of the rock mass structure. Polyhedral modelling and kinematic analyses are combined to estimate the volume and shape distribution of unstable blocks. Unstable blocks are then classified according their shape. Second, a 3D discrete element rockfall model is presented which allows for an accurate prediction of velocities and run-out distances for rock slopes with and without drapery. The 3D model is used to predict trajectories and velocities for blocks representative of a highwall, i.e. block size and shape according the results from the polyhedral modelling. The focus is to investigate the efficiency of the drapery and to quantify the residual rockfall hazard at the base of a highwall.

References:
Abbruzzese, J.M., Sauthier, C. and Labiouse, V. (2009) Considerations on Swiss methodologies for rock fall hazard mapping based on trajectory modelling, Natural Hazards and Earth System Sciences, European Geosciences Union, Vol. 9(4), pp. 1095–1109.
Agliardi, F. and Crosta, G.B. (2003) High resolution three-dimensional numerical modelling of rockfalls, International Journal of Rock Mechanics and Mining Sciences, Elsevier, Vol. 40(4), pp. 455–471.
Alejano, L., Pons, B., Bastante, F., Alonso, E. and Stockhausen, H. (2007) Slope geometry design as a means for controlling rockfalls in quarries, International Journal of Rock Mechanics and Mining Sciences, Elsevier, Vol. 44(6), pp. 903–921.
Alejano, L., Stockhausen, H., Alonso, E., Bastante, F. and Ramírez-Oyanguren, P. (2008) ROFRAQ: A statistics-based empirical method for assessing accident risk from rockfalls in quarries, International Journal of Rock Mechanics and Mining Sciences, Elsevier, Vol. 45(8), pp. 1252–1272.
CAE Mining (2013) Sirovision Version 5.1, mapping and analysis system, .
Cundall, P.A. and Strack, O.D.L. (1979) A discrete numerical model for granular assemblies, Géotechnique, Vol. 29(1), pp. 47–65.
Dorren, L.K.A. (2003) A review of rockfall mechanics and modelling approaches, Progress in Physical Geography, Sage Publications, Vol. 27(1), pp. 69–87.
Elmouttie, M., Poropat, G. and Krähenbühl, G. (2010) Polyhedral modelling of rock mass structure, International Journal of Rock Mechanics and Mining Sciences, Elsevier, Vol. 47(4), pp. 544–552.
Elmouttie, M. and Poropat, G. (2011) A method to estimate in situ block size distribution, Rock Mechanics and Rock Engineering, Elsevier, Vol. 37, pp. 529–535.
Giacomini, A., Thoeni, K., Lambert, C., Booth, S. and Sloan, S.W. (2012a) Experimental study on rockfall drapery systems for open pit highwalls, International Journal of Rock Mechanics and Mining Sciences, Elsevier, Vol. 56, pp. 171–181.
Giacomini, A., Lambert, C. and Thoeni, K. (2012b) Improved management of the rock fall hazard at the base of the highwalls, Tech. Rep. ACARP C19026, Australian Coal Association Research Program.
Giani, G.P. (1992) Rock Slope Stability Analysis, Chap. 7, A.A. Balkema, pp. 191–208.
Goodman, R.E. and Shi, G. (1985) Block theory and its application to rock engineering, Prentice-Hall, New Jersey, USA.
Haneberg, W. (2008) Using close range terrestrial digital photogrammetry for 3-d rock slope modeling and discontinuity mapping in the United States, Bulletin of Engineering Geology and the Environment, Springer, Vol. 67(4), pp. 457–469.
Jaboyedoff, M. (2005) An attempt to refine rockfall hazard zoning based on the kinetic energy, frequency and fragmentation degree, Natural Hazards and Earth System Sciences, European Geosciences Union, Vol. 5, pp. 621–632.
Kalenchuk, K.S., Diederichs, M.S. and McKinnon, S. (2006) Characterizing block geometry in jointed rockmasses, International Journal of Rock Mechanics and Mining Sciences, Elsevier, Vol. 43(8), pp. 1212–1225.
Lambert, C., Thoeni, K., Giacomini, A., Casagrande, D. and Sloan, S.W. (2012) Rockfall hazard analysis from discrete fracture network modelling with finite persistence discontinuities, Rock Mechanics and Rock Engineering, Elsevier, Vol. 45(5), pp. 871–884.
Pfeiffer, T.J. and Bowen, T. (1989) Computer simulation of rock-falls, Bulletin of the Association of Engineering Geologists, Springer, Vol. 26 (1), pp. 135–146.
Šmilauer, V., Catalano, E., Chareyre, B., Dorofenko, S., Duriez, J., Gladky, A., Kozicki, J., Modenese, C., Scholtès, L., Sibille, L., Stránskỳ, J. and Thoeni, K. (2010) Yade Documentation, The Yade Project, 1st edition, viewed 10 July 2013,
.
Sturzenegger, M. and Stead, D. (2009) Close-range terrestrial digital photogrammetry and terrestrial laser scanning for discontinuity characterization on rock cuts, Engineering Geology, Elsevier, Vol. 106(3-4), pp. 163–182.
Sturzenegger, M., Stead, D. and Elmo, D. (2011) Terrestrial remote sensing-based estimation of mean trace length, trace intensity and block size/shape, Engineering Geology, Elsevier, Vol. 119(3-4), pp. 96–111.
Thoeni, K., Giacomini, A., Sloan, S.W., Lambert, C. and Casagrande, D. (2011) Numerical analysis of rockfall hazard in open pit coal mines, in Proceeding Computer Methods for Geomechanics: Frontiers and New Application, International Conference of the International Association for Computer Methods and Advances in Geomechanics, N. Khalili and M. Oeser (eds), 9–13 May 2011, Melbourne, Australia, International Association for Computer Methods and Advances in Geomechanics, Tucson, Vol. 2, pp. 1151–1156.
Thoeni, K., Irschara, A. and Giacomini, A. (2012) Efficient photogrammetric reconstruction of highwalls in open pit coal mines, in Proceedings 16th Australian Remote Sensing and Photogrammetry Conference, 27–28 August 2012, Melbourne, Australia, Remote Sensing and Photogrammetry Commission, Deakin West, pp. 85–90.
Thoeni, K., Giacomini, A., Lambert, C., Sloan, S.W. and Carter, J.P. (2013a) A 3D discrete element modelling approach for rockfall analysis with drapery systems, International Journal of Rock Mechanics and Mining Sciences, Elsevier, submitted (IJRMMS−S-13-00201).
Thoeni, K., Lambert, C., Giacomini, A. and Sloan, S.W. (2013b) Discrete modelling of hexagonal wire meshes with a stochastically distorted contact model, Computers and Geotechnics, Elsevier, Vol. 49, pp. 158–169.
Turner, A.K. and Schuster, R.L. (2012) Rockfall: Characterization and Control, Transportation Research Board, Washington, D.C., 658 p.
Volkwein, A., Schellenberg, K., Labiouse, V., Agliardi, F., Berger, F., Bourrier, F., Dorren, L.K.A., Gerber, W. and Jaboyedoff, M. (2011) Rockfall characterization and structural protection – a review, Natural Hazards and Earth System Sciences, European Geosciences Union, Vol. 11, pp. 2617–2651.




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