Authors: Falorni, G; Del Conte, S; Bellotti, F; Colombo, D

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Falorni, G, Del Conte, S, Bellotti, F & Colombo, D 2018, 'InSAR monitoring of subsidence induced by underground mining operations', in Y Potvin & J Jakubec (eds), Proceedings of the Fourth International Symposium on Block and Sublevel Caving, Australian Centre for Geomechanics, Perth, pp. 705-712.

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Underground cave and longwall mining can produce subsidence of the ground surface. Mapping of the extent and magnitude of ground movement is usually one of the main challenges faced by mine operators and is important for mine planning, operational hazard assessment and to evaluate environmental and socioeconomic impacts. Until now, subsidence prediction was based on complex numerical modelling that typically used a small set of discrete data points as input to calibrate the model. These measurements were both spatially and temporally sparse. The advent of interferometric synthetic aperture radar (InSAR) significantly changed this scenario by providing a high density of measurement points with a high sampling frequency in time. Additional beneficial features of InSAR for mine sites include: (i) the provision of information without the need to install ground instrumentation (no need to access remote or hazardous sites), (ii) the capability to perform historical ground deformation analyses thanks to the existence of data archives going back to the 1990s (worldwide coverage is available from at least May 2016), and (iii) millimetric sensitivity to vertical deformation, which allows accurate characterisation of the areas affected by subsidence. Two case studies of InSAR monitoring applied to underground mining operations are presented, highlighting the advantages of combining different InSAR techniques to monitor both slow and fast movements. Keywords: InSAR, monitoring, underground mining, block/panel caving, slope stability


Bamler, R & Hartl, P 1998, ‘Synthetic aperture radar interferometry’, Inverse Problems, vol. 14, pp. R1–R54.
Carnec, C & Delacourt, C 2000, ‘Three years of mining subsidence monitored by SAR interferometry, near Gardanne, France’, Journal of Applied Geophysics, vol. 43, pp. 43–54.
Colesanti, C, Mouelic, SL, Bennani, M, Raucoules, D, Carnec, C & Ferretti, A 2005, ‘Detection of mining related ground instabilities using the Permanent Scatterers technique: a case study in the east of France’, International Journal of Remote Sensing, vol. 26, no. 1, pp. 201–207.
DeBono, P & Tarrant, G 2011, ‘An analysis of long term subsidence at Metropolitan colliery’, Proceedings of the Eighth Triennial Conference on Management of Subsidence, Mine Subsidence Technological Society, Pokolbin, pp. 81–88.
Espinosa, AE, Mora, O & Sanchez, F 2014, ‘Application of InSAR technique for monitoring and control of surface subsidence generated by underground mining’, in R Castro (ed), Proceedings of the 3rd International Symposium on Block and Sublevel Caving, Universidad de Chile, Santiago, pp. 603–610.
Ferretti, A, Prati, C & Rocca, F 2000, ‘Nonlinear subsidence rate estimation using permanent scatterers in differential SAR interferometry’, IEEE Transactions on Geoscience and Remote Sensing, vol. 38, no. 5, pp. 2202–2212.
Ferretti, A, Prati, C & Rocca, F 2001, ‘Permanent scatterers in SAR interferometry’, IEEE Transactions on Geoscience and Remote Sensing, vol. 39, no. 1, pp. 8–20.
Ferretti, A, Fumagalli, A, Novali, F, Prati, C, Rocca, F & Rucci, A 2011, ‘A new algorithm for processing interferometric data-stacks: SqueeSAR’, IEEE Transactions on Geoscience and Remote Sensing, vol. 49, no. 9, pp. 3460–3470.
Flores, GE 2005, Rock Mass Response to the Transition From Open Pit to Underground Cave Mine, PhD thesis, The University of Queensland, Brisbane.
Gabriel, AK, Goldstein, RM & Zebker, HA 1989, ‘Mapping small elevation changes over large areas: differential radar interferometry’, Journal of Geophysical Research, vol. 94, pp. 9183–9191.
Herrera, G, Tomás, R, Lopez-Sanchez, JM, Delgado, J, Mallorqui, JJ, Duque, S & Mulas, J 2007, ‘Advanced DInSAR analysis on mining areas: La Union case study (Murcia, SE Spain)’, Engineering Geology, vol. 90, pp. 148–159.
Herrera, G, Tomas, R, Vicente, F, Lopez-Sanches, JM, Mallorquí, JJ & Mulas, J 2010, ‘Mapping ground movements in open pit mining areas using differential SAR interferometry’, International Journal of Rock Mechanics & Mining Sciences, vol. 47,
pp. 1114–1125.
Hutton, AC 2009, ‘Geological setting of Australasian coal deposits’, in R Kininmonth & E Baafi (eds), Australasian Coal Mining Practice, The Australasian Institute of Mining and Metallurgy, Melbourne, vol. 3053, pp. 15–31.
Iannacone, JP, Corsini, A, Berti, M, Morgan, J & Falorni, G 2014, ‘Characterization of longwall mining induced subsidence by means of automated analysis of InSAR time-series’, Engineering Geology for Society and Territory, vol. 5, pp. 973–977.
Jung, HC, Kim, SW, Jung, HS, Min, KD & Won, JS 2007, ‘Satellite observation of coal mining subsidence by persistent scatterer analysis’, Engineering Geology, vol. 92, pp. 1–13.
Kvapil, R, Ceccarelli, B & Lonergan, J 1989, Quantitative Analysis of Subsidence at El Teniente mine, technical report, El Teniente Division, CODELCO-Chile.
Massonnet, D & Feigl, KL 1998, ‘Radar interferometry and its application to changes in the Earth’s surface’, Reviews of Geophysics, vol. 36, no. 4, pp. 441–500.
Paradella, WR, Ferretti, A, Mura, JC, Colombo, D, Gama, F, Tamburini, A, Santos, AR, Novali, F, Galo, M, Camargo, PO, Silva, AQ, Silva, GG, Silva, A & Gomes, LL 2015, ‘Mapping surface deformation in open pit iron mines of Carajas Province (Amazon Region) using an integrated SAR analysis’, Engineering Geology, vol. 193, pp. 61–78.
Peck, RB 1969, ‘Deep excavation and tunnelling in soft ground – state of the art’, Proceedings of the 7th International Conference on Soil Mechanics and Foundations, Sociedad Mexicana de Meca╠ünica de Suelos, pp. 225–290.
Raucoles, D, Maisons, C, Carnec, C, Mouelic, SL, King, C & Hosford, S 2003, ‘Monitoring of slow ground deformation by ERS radar interferometry on the Vauvert salt mine (France): comparisons with ground-based measurement’, Remote Sensing of Environment, vol. 88, pp. 468–478.
Rosen, P, Hensley, S, Joughin, I, Li, F, Madsen, SN, Rodriguez, E & Goldstein, R 2000, ‘Synthetic aperture radar interferometry’, Proceedings of the IEEE, vol. 88, no. 3, pp. 333–382.
Sánchez, F, Conde, A & Salvá, B 2017, ‘Use of SAR radar satellite data to measure ground deformation in underground and open pit mine sites, El Teniente case study, Chile’, in PM Dight (ed.), Proceedings of the First Asia Pacific Slope Stability in Mining Conference, Australian Centre for Geomechanics, Perth, pp. 379–386.
Shadbolt, CH 1972, ‘Subsidence engineering’, University of Nottingham Mining Department Magazine, vol. 24, pp. 80–89.

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