Landeros Córdova, P 2022, 'Geomechanical risk management and control at Andes Norte project: El Teniente mine', in Y Potvin (ed.), Caving 2022: Proceedings of the Fifth International Conference on Block and Sublevel Caving
, Australian Centre for Geomechanics, Perth, pp. 31-48, https://doi.org/10.36487/ACG_repo/2205_0.003
El Teniente mine expansion plans are currently under development with construction stages through an integrated project strategy that will allow the continuity of future mining. The deepest sector corresponds to Andes Norte project, which has the additional mission of producing new knowledge and experience in deep mining. The project is planned as conventional panel caving with the application of hydraulic fracturing to mitigate the seismic hazard during future mining. It also considers the construction of the definitive material handling system, consisting of a crushing chamber with a capacity of 60,000 tons per day and a 9 km long tunnel to shelter the conveyor belt. This tunnel is currently under construction and the most complex zones have experienced rockbursts.
This article describes the main elements that integrate the geomechanical risk management and control strategy for the Andes Norte Project, addressing risk concepts and strategies, mine design layouts, rock support design and hydraulic fracturing considerations, in addition to the experience gained during its construction and also with El Teniente mine experience applied to this future mining sector.
Keywords: risk management, risk control, rockburst, hydraulic fracturing, rock support, panel caving
Balboa, S, Bustos, N, García, F & Van Sint Jan, M 2017, El Teniente Mine-Scale Numerical Model, Codelco, internal report (in Spanish).
Barahona, M & Pardo, C 2017, Hydraulic Fracturing Morphology Trials Design, Codelco, internal report (in Spanish).
Celhay, F 2016, Geological Plan Views, Codelco, internal presentation (in Spanish).
Cifuentes, C, Romero, D & Rojas, E 2019, Hydraulic Fracturing Morphology Trials, Results Interpretation, Codelco, internal report
Cifuentes, C & Arce, J 2020, Hydraulic Fracturing Design and Optimization, Codelco, internal report (in Spanish).
Codelco 2012, Procedure for Corporate Risk Management, Codelco, internal report (in Spanish).
Landeros, P, Cuello, D & Rojas, E 2012, ‘Caveback management at Reservas Norte Mine, Codelco Chile El Teniente Division’, Proceedings of the Sixth International Conference & Exhibition on Mass Mining (Massmin 2012), Canadian Institute of Mining, Metallurgy and Petroleum, Sudbury.
Madrid, A 2020, Ventilation Shafts, Steel Liner Installation, Codelco, internal presentation (in Spanish).
Moraga, C 2018, Methodology for Generating 3D Models to Monitor Boreholes, Ore Passes and Shafts, Codelco, internal report (in Spanish).
Muñoz, A, Zepeda, R & Rojas, E 2016, ‘Methodology for incorporating new elements of support for the mine design in El Teniente mine’, in E Nordlund, T Jones & A Eitzanberger (eds), Proceedings of the 8th International Symposium on Ground Support in Mining and Underground Construction, Luleå University of Technology, Luleå, pp. 211–222.
Muñoz, A 2019, Rock Support Design Considerations, Codelco, internal presentation (in Spanish).
Padilla, R & Ferrada, C 2018, Andes Norte Main Geological Features, Codelco, internal report (in Spanish).
Pardo, C & Rojas, E 2016, ‘Selection of exploitation method based on the experience of hydraulic fracture techniques at the
El Teniente mine, Proceedings of the Seventh International Conference & Exhibition on Mass Mining (Massmin 2016), The Australasian Institute of Mining and Metallurgy, Melbourne, pp. 97–103.
Parraguez, R 2011, Damage Induced by Seismicity at Pilar Norte Sector, Codelco, internal presentation (in Spanish).
Rodríguez, W 2019, Breakout Identification, Codelco, internal presentation (in Spanish).
Rojas, E, Balboa, S, Bustos, N & Muñoz, A 2016, Crown Pillar design for the El Teniente New Mine Level Project, Codelco, internal report (in Spanish).
Rojas, E & Landeros, P 2017, ‘Hydraulic Fracturing applied to tunnel development at El Teniente mine’, in J Vallejos (ed), Proceedings of the Ninth Rockburst and Seismicity in Mines Conference (Rasim9), pp. 251–257.
Rojas, E & Landeros, P 2002, ‘Rockburst risk management to make tunnel construction feasible in high stress environments, Codelco El Teniente’, in M Diederichs (ed), Proceedings of the Tenth Rockburst and Seismicity in Mines Conference (Rasim10).
Romero, D, Rodríguez, W & Cisternas, P 2019, Seismic Vulnerability Index Estimation Methodology, Codelco, internal report