Authors: Li, J

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DOI https://doi.org/10.36487/ACG_repo/2025_94

Cite As:
Li, J 2020, 'Elimination of structure controlled highwall failures at an open cut coal mine', in PM Dight (ed.), Proceedings of the 2020 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering, Australian Centre for Geomechanics, Perth, pp. 1373-1382, https://doi.org/10.36487/ACG_repo/2025_94

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Abstract:
Open cut coal mines, particularly fresh rock masses of open cut coal mines, experience few large highwall failures unless one or more unfavourable geological structures daylight. A number of challenges exist for identifying, analysis and operationally controlling the failure risk. The first challenge is to obtain accurate fault models (or planes) from traditional exploration by drill holes, until the geological structures are exposed on a highwall face and a coal seam roof. The second challenge is to acquire rock mass strengths and then to use process to assess the stability of the potential structure controlled failure. The third is to propose a most effective strategy to eliminate or control the potential large structure during pit design to coal uncovering stages, as soon as the fault structure plane becomes available. Consequently, the coal along the riskeliminated area can be mined the safely to design. This paper presents details of confronting these challenges and examples of proactively managing highwall failure risks at a Bowen Basin open cut coal mine in Queensland, Australia.

Keywords: open cut coal mine, geological structure, highwall, failure elimination

References:
Hoek, E 1998, Practical Rock Engineering, viewed 2 October 2000,
Hoek, E 2007, Practical Rock Engineering, viewed 28 August 2019, /Practical-Rock-Engineering-Full-Text.pdf
Kalamaras, GS & Bieniawski, ZT 1995, ‘A rock mass strength concept for coal seams incorporating the effect of time’, in T Fujii (ed.) Proceedings 8th International Congress on Rock Mechanics, A.A. Balkema, Rotterdam, vol. 1, pp.295–302.
Li, J 2004, Critical Strain of Intact Rock and Rock Masses, PhD thesis, Curtin University of Technology, Perth.
Li, J, Tucker, N & Todd, JK 2016, ‘Impact of rock mass strength parameters on lowwall stability assessment outcomes in open-cut coal mines’, in A McConnell, R Kelly & B Lehane (eds), Proceedings of the Fifth International Conference on Geotechnical & Geophysical Site Characterisation, International Society for Soil Mechanics and Geotechnical Engineering, London.
Rocscience Inc 2019a, RocData, version 5.0, computer software, Rocscience Inc, Toronto, https://www.rocscience.com/software/rocdata
Rocscience Inc 2019b, Swedge, version 6.0, computer software, Rocscience Inc, Toronto, https://www.rocscience.com/software/swedge
Simmons, JV & McManus, DA 2004, ‘Shear strength framework for design of dumped spoil slopes for open pit coal mines’, in RJ Jardine, DM Potts & KG Higgins (eds), Proceedings Advances in Geotechnical Engineering, Thomas Telford Limited, London, pp. 981–991.
Villaescusa, E & Li, J 2004, ‘A review of empirical methods used to estimate rock mass compressive strength and deformability in mining industry’, in A Karzulovic & MA Alfaro (eds), Proceedings of Massmin 2004, Instituto de Ingenieros de Chile, Santiago, pp. 59–68.
Wesseloo, J & Read, J 2009, ‘Acceptable criteria’, in Read J & Stacey P (eds), Guidelines for Open Pit Slope Design, CSIRO Publishing, Clayton, pp. 221–236.




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