Physical modelling as a tool to improve our understanding of mechanisms of cave flow
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Authors: Castro, R; Gómez, RE; Pérez, Á Open access courtesy of:
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DOI https://doi.org/10.36487/ACG_repo/2205_74
Cite As:
Castro, R, Gómez, RE & Pérez, Á 2022, 'Physical modelling as a tool to improve our understanding of mechanisms of cave flow', in Y Potvin (ed.), Caving 2022: Proceedings of the Fifth International Conference on Block and Sublevel Caving, Australian Centre for Geomechanics, Perth, pp. 1071-1088, https://doi.org/10.36487/ACG_repo/2205_74
Abstract:
In block caving, gravity flow of broken ore has been studied using different tools, highlighting the application of scaled physical models, numerical modelling and field studies. These tools, with their advantages and disadvantages, have allowed different variables involved during ore draw to be studied. In this paper, we summarise years of physical experiments run in the Block Caving Laboratory to study different underground mining issues. In particular, experiments have been carried out to study fine material migration, induced stresses due to ore draw, secondary fragmentation, hang-ups formed on drawpoints, drawbell geometries, inrush of fines material, and ore extraction in mud conditions. The main significances, its impact and application, are discussed here. This work shows that physical modelling continues to be a powerful and useful tool to study gravity flow in block cave mines, allowing to understand diverse mine engineering problems and to be a practical input to calibrate complex numerical models.
Keywords: block caving, gravity flow, physical modelling, rock mechanics, underground mining
References:
Armijo, F, Irribarra, S & Castro, R 2014, ‘Experimental study of fines migration for caving mines’, in R Castro (ed), Caving 2014: Proceedings of the 3rd International Symposium on Block and Sublevel Caving, Universidad de Chile, Santiago, pp. 356–362.
ASTM International 2003, Standard Test Method for Slump of Hydraulic-Cement Concrete (ASTM C143 2003), ASTM International, West Conshohocken.
ASTM International 2002, Standard Test Methods for Absorption and Bulk Specific Gravity of Dimension Stone (ASTM C97 2002), ASTM International, West Conshohocken.
ASTM International 2018, Standard Test Methods for of Soil Specific Gravity Solids by Water Pycnometer (ASTM D 854 2018), ASTM International, West Conshohocken.
ASTM International 2011, Standard Test Method for Direct Shear Test of Soils under Consolidated Drained Conditions (ASTM D3080/D3080M 2011), ASTM International, West Conshohocken.
ASTM International 2008, Standard Test Method for Determination of the Point Load Strength Index of Rock and Application to Rock Strength Classifications (ASTM D5731 2008), ASTM International, West Conshohocken.
Baxter, GW 2012, ‘Cellular automata models of granular flow’, Experimental and Computational Techniques in Soft Condensed Matter Physics, 9780521115(2), pp. 209–229.
Bock, S & Prusek, S 2015, ‘Numerical study of pressure on dams in a backfilled mining shaft based on PFC3D code’, Computers and Geotechnics, vol. 66, pp. 230–244.
Bridgwater, J, Utsumi, R, Zhang, Z & Tuladhar, T 2003, ‘Particle attrition due to shearing - the effects of stress, strain and particle shape’, Chemical Engineering Science, vol. 58, no. 20, pp. 4649–4665.
Brown, ET 2007, Block Caving Geomechanics, 2nd edn, Julius Kruttschnitt Mineral Research Centre, The University of Queensland, Brisbane.
Brunton, I, Lett, G & Sharrock, G 2016, ‘Full-scale flow markers experiments at Ridgeway Deeps and Cadia East Cave Operations’, MassMin 2016: Proceedings of the Seventh International Conference & Exhibition on Mass Mining, Australasian Institute of Mining and Metallurgy, Melbourne, pp. 817–824.
Calderon, C, Alfaro, M & Saavedra, J 2004, ‘Computational model for simulation and visualization of gravitational flow’, in A Karzulovic & M Alfaro (eds), Proceedings of Massmin 2004, Instituto de Ingenieros de Chile, Santiago, 185–188.
Castro, R, Gómez, R & Hekmat, A 2016, ‘Experimental quantification of hang-up for block caving applications’, International Journal of Rock Mechanics and Mining Sciences, vol. 85, pp. 1–9,
Castro, RL, Basaure, K, Palma, S & Vallejos, J 2017, ‘Geotechnical characterization of ore related to mudrushes in block caving mining’, Journal of the Southern African Institute of Mining and Metallurgy, vol. 117, no. 3, pp. 275–284.
Castro, R & Pineda, M 2015, ‘The role of gravity flow in the design and planning of large sublevel stopes’, Journal of the Southern African Institute of Mining and Metallurgy, vol. 115, no. 2, pp. 113–118.
Castro, R 2007, Study of the Mechanisms of Gravity Flow for Block Caving, The University of Queensland, Brisbane.
Castro, R, López, S, Gomez, R, Ortiz, S & Carreño, N 2020a, “Experimental study of the influence of drawbell geometry on hang-Ups in cave mine applications,’ Rock Mechanics and Rock Engineering, vol. 54, no. 1, pp. 1–10.
Castro, R, Gómez, R, Pierce, M & Canales, J 2020b, ‘Experimental quantification of vertical stresses during gravity flow in block caving’, International Journal of Rock Mechanics and Mining Sciences, vol. 127.
Castro, R, Arancibia, L & Gómez, R 2022a, ‘Quantifying fines migration in block caving through 3D experiments’, International Journal of Rock Mechanics and Mining Sciences, vol. 151, pp. 8–10.
Castro, R, Gómez, R & Arancibia, L 2022b, ‘Fine material migration modelled by cellular automata’, Granular Matter, vol. 24, no. 1, pp. 1–11.
Castro, R, Betancourt F, Gómez R, Salas, O & Zarabia, J 2022c, ‘Experimental study of mudrush mechanisms in block caving’, Mining, Reclamation and Environment, under review.
Castro, RL, Fuenzalida, MA & Lund, F 2014, ‘Experimental study of gravity flow under confined conditions’, International Journal of Rock Mechanics and Mining Sciences, vol. 67, pp. 164–169.
Cho, Gye-Chun, Dodds, J & Santamarina, JC 2006, ‘Particle shape fffects on packing density, stiffness, and strength: natural and crushed sands’, Journal of Geotechnical and Geoenvironmental Engineering, vol. 132, no. 5, pp. 591–602.
Cid, P 2019, Simulacion de Flujo Gravitacional En Batea de Extraccion a Traves de Elementos Discretos, Universidad de Concepción, Concepción.
Cleary, PW & Sawley, ML 2002, ‘DEM modelling of industrial granular flows: 3D case studies and the effect of particle shape on hopper discharge’, Applied Mathematical Modelling, vol. 26, no. 2, pp. 89–111.
Cooke, MH, Bridgwater, J & Scott, AM 1978, ‘Interparticle percolation: lateral and axial diffusion coefficients’, Powder Technology, vol. 21, no. 2, pp. 183–193.
Dassault Systèmes 2018, PCBC, computer software, https://www.3ds.com/products-services/geovia/products/pcbc/
ESSS 2022, Rocky DEM, computer software, https://rocky.esss.co/new/new-rocky-dem-2022r1/
Gómez, R, Castro, R, Casali, A, Palma, S & Hekmat, A 2017, ‘A comminution model for secondary fragmentation assessment for block caving’, Rock Mechanics and Rock Engineering, vol. 50, no. 11, pp. 3073–3084.
Gómez, R, Castro, R, Betancourt, F & Moncada, M 2021, ‘Comparison of normalized and non-normalized block caving comminution models’, Journal of the Southern African Institute of Mining and Metallurgy, vol. 121, no. 11, pp. 581–588.
Gómez, R & Castro, R 2022a, ‘Experimental quantification of granular material fragmentation due to travel distance’, Mining, Metallurgy & Exploration, vol. 39, no. 2, pp. 615–623.
Gómez, R & Castro, R 2022b, ‘Stress modelling using cellular automata for block caving applications’, International Journal of Rock Mechanics and Mining Sciences, vol. 154,
Gustafsson, P 1998, Waste Rock Content Variations During Gravity Flow in Sublevel Caving, Luleå University of Technology, Luleå.
Hancock, W 2013, Gravity Flow of Rock in Caving Mines : Numerical Modelling of Isolated, Interactive and Non-Ideal Draw, The University of Queensland, Brisbane.
Hashim, M 2011, Particle Percolation in Block Caving Mines, PhD thesis, The University of New South Wales, Sydney.
Jenike, AW, Johanson, JR & Carson, JW 1973, ‘Bin Loads—Part 3: Mass-Flow Bins’, Journal of Engineering for Industry, vol. 95, no. 1, pp. 6–12.
Jimenez, O 2020, Modelación Numérica de La Fragmentación Secundaria En Minería de Caving a Través de DEM, Universidad de Concepción, Concepción.
Jolley, D 1968, ‘Computer simulation of the movement of ore and waste in an underground mining pillar’, The Canadian Mining and Metallurgical Bulletin, vol. 61, no. 675, pp. 854–859.
Killion, ME 1985, ‘Design pressures in circular bins’, Journal of Structural Engineering, vol. 111, no. 8, pp. 1760–1774.
Kvapil, R 1965, ‘Gravity flow of granular materials in hoppers and bins - Part I’, International Journal of Rock Mechanics and Mining Sciences, vol. 2, no. 1, pp. 35–41.
Kvapil, R 2008, Gravity Flow in Sublevel and Panel Caving, Luleå University of Technology Press, Luleå.
Langston, PA, Tüzün, U & Heyes, DM 1995, ‘Discrete element simulation of internal stress and flow fields in funnel flow hoppers’, Powder Technology, vol. 85, no. 2, pp. 153–169.
Laubscher, DH 1994, ‘Cave mining - the State of the Art’, Journal of the Southern African Institute of Mining and Metallurgy, vol. 94, no. 10, pp. 279–293.
Laubscher, DH 2000a, Block Cave Manual, Julius Kruttschnitt Mineral Research Centre, The University of Queensland, Brisbane.
Laubscher, DH 2000b, ‘Dilution’, Block Cave Manual, prepared for the International Caving Study (1997-2000), Julius Kruttschnitt Mineral Research Centre, and Itasca Consulting Group, Brisbane.
Hashim, MHM, Sharrock, GB & Saydam, S 2008, ‘A review of particle percolation in mining’, 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. 273–284,
Mahmoodi, F 2012, ‘Compression mechanics of powders and granular materials probed by force distributions and a micromechanically based compaction equation’, doctoral dissertation, Uppsala University, Uppsala.
Michot-Roberto, S, Garcia-Hernández, A, Dopazo-Hilario, S & Dawson, A 2021, ‘The spherical primitive and perlin noise method to recreate realistic aggregate shapes, Granular Matter, vol. 23, no. 2,
Olivares, D, Castro, R, & Hekmat, A, 2015, ‘Influence of fine material, humidity and vertical loads on the flowability of caved rock’, Proceedings of the 49th U.S. Rock Mechanics/Geomechanics Symposium, American Rock Mechanics Association, Alexandria.
Orellana, LF 2012, Evaluación de Variables de Diseño Del Sistema de Minería Continua a Partir de Experimentación En Laboratorio, Universidad de Chile, Santiago.
Orellana, M, Cifuentes, C & Díaz, J 2014, ‘Caving Experiences in Esmeralda Sector, El Teniente Mine’ in R Castro (ed), Caving 2014: Proceedings of the 3rd International Symposium on Block and Sublevel Caving, Universidad de Chile, Santiago, pp. 78–90.
Pierce, ME, Cundall, PA, Van Hout, G & Lorig, L 2017, ‘PFC 3D modeling of caved rock under draw’, Numerical Modeling in Micromechanics via Particle Methods, pp. 211–217.
Pierce, ME 2019, ‘Forecasting vulnerability of deep extraction level excavations to draw-induced cave loads’, Journal of Rock Mechanics and Geotechnical Engineering, vol. 11, no. 3, pp. 527–534,
Pierce, ME 2009, A Model for Gravity Flow of Fragmented Rock in Block Caving Mines, PhD thesis, The University of Queensland, Brisbane.
Power, G 2004, ‘Full scale SLC draw trials at Ridgeway gold mine’, in A Karzulovic & M Alfaro (eds), Proceedings of Massmin 2004, Instituto de Ingenieros de Chile, Santiago, pp. 225–230.
Sahupala, H, Brannon, C, Annavarapu, S & Osborne, K 2008, ‘Recovery of extraction pillars in the Deep Ore Zone (DOZ) block cave, PT Freeport Indonesia’, in H Schunnesson & E Nordlund (eds), MassMin 2008: Proceedings of the 5th Conference and Exhibition on Mass Mining, Luleå University of Technology, Luleå, pp. 191–202.
Sánchez, V, Castro, RL & Palma, S 2019, ‘Gravity flow characterization of fine granular material for block caving’, International Journal of Rock Mechanics and Mining Sciences, vol. 114, pp. 24–32,
Sperl, M 2006, ‘Experiments on corn pressure in silo cells - translation and comment of Janssen’s paper from 1895’, Granular Matter, vol. 8, no. 2, pp. 59–65.
Steffen, S & Kuiper, P 2014, ‘Case study: improving SLC recovery by measuring ore flow with electronic markers’, in R Castro (ed), Caving 2014: Proceedings of the 3rd International Symposium on Block and Sublevel Caving, Universidad de Chile, Santiago, pp. 328–336.
Sun, H, Gao, Y, Elmo, D, Jin, A, Wu, S & Dorador L 2019, ‘A study of gravity flow based on the upside-down drop shape theory and considering rock shape and breakage’, Rock Mechanics and Rock Engineering, vol. 52, no. 3, pp. 881–893,
Susaeta, A 2004, ‘Theory of gravity flow (part 1)’, in A Karzulovic & M Alfaro (eds), Proceedings of Massmin 2004, Instituto de Ingenieros de Chile, Santiago, pp. 167–172.
Torres, C 2019, Rate of Draw Effect on Fragmentation, Santiago.
Vallejos, J, Basaure, K, Palma, S, & Castro, R 2017, ‘Methodology for evaluation of mud rush risk in block caving mining’, Journal of the Southern African Institute of Mining and Metallurgy, vol. 117, no. 5, pp. 491–497.
Vergara, P 2016, Estudio Experimental de Flujo Gravitacional En Minería de Panel Caving, Universidad de Chile, Santiago.
Viera, E & Diez, E 2014, ‘Analysis of hang-up frequency in Bloque 1–2, Esmeralda Sur Mine’, in R Castro (ed), Caving 2014: Proceedings of the 3rd International Symposium on Block and Sublevel Caving, Universidad de Chile, Santiago, pp. 138–145.
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