Authors: Mora, O; Álvarez, I; Amor Herrera, E


Cite As:
Mora, O, Álvarez, I & Amor Herrera, E 2013, 'Slope stability study in open pit and underground mines by means of forensic analysis and radar interferometry', in PM Dight (ed.), Slope Stability 2013: Proceedings of the 2013 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering, Australian Centre for Geomechanics, Perth, pp. 1021-1032,

Download citation as:   ris   bibtex   endnote   text   Zotero

This paper demonstrates the capabilities of satellite radar technology to generate complete ground deformation maps of an open pit mine, to follow and detect movement intensities ranging from millimetric to metric scales. Several vulnerable parts of the mine have been studied and monitoring of these very small to very large instabilities has provided valuable information for risk and exploitation management at the mine. A forensic analysis has been also performed and validated with these interferometric radar measurements. Images from the X-band high resolution images of TerraSAR-X satellite have been acquired between 2008 and 2012 to monitor ground displacement evolution. Two types of ground markers, natural reflectors providing backscattering of the terrain and trihedral artificial reflectors installed on certain areas of the mine have been used. Measurement quality depends on the temporal changes, and several radar Interferometric techniques, including persistent scatterer interferometry (PSI) and Altamira Information developments (stable point network and non-coherent technique) have been used to detect displacement intensities. Phenomena caused by mine activities have been detected, showing a perfect temporal correlation with the mine evolution. The project has also been very useful for the control and analysis of a strong slope instability affecting the open pit, where displacements have been more than 10 m in some months.

Adam, N., Parizzi, A. and Crosetto, M. (2009) Practical Persistent Scatterer Processing Validation in the Course of the Terrafirma Project, Journal of Applied Geophysics, Vol. 69, pp. 59–65.
Arnaud, A., Adam, N., Hanssen, R., Inglada, J., Duro, J., Closa, J. and Einederm, M. (2003) ASAR ERS interferometric phase continuity, in Proceedings International Geoscience and Remote Sensing Symposium, 21–25 July 2003, Toulouse, France, Institute of Electrical and Electronics Engineers, New York.
Duro J., Inglada, J., Closa, J., Adam, N. and Arnaud, A. (2003) High resolution differential interferometry using time series of ERS and ENVISAT SAR data, in Proceedings FRINGE 2003, 1–5 December 2003, Frascati, Italy, European Space Agency, Frascati.

© Copyright 2022, Australian Centre for Geomechanics (ACG), The University of Western Australia. All rights reserved.
Please direct any queries or error reports to