Authors: Vidal da Silva, AE

Open access courtesy of:

DOI https://doi.org/10.36487/ACG_repo/2205_16

Cite As:
Vidal da Silva, AE 2022, 'The B11 support methodologies and QAQC systems: creating and implementing a traceable support system', in Y Potvin (ed.), Caving 2022: Fifth International Conference on Block and Sublevel Caving, Australian Centre for Geomechanics, Perth, pp. 255-268, https://doi.org/10.36487/ACG_repo/2205_16

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Abstract:
The B11 block cave at BHP Leinster mine is a mini block cave located below and adjacent to the historic Perseverance sublevel cave. The host environment is characterised by high stress conditions (due to both regional stress and previous mining) as well as localised zones of poor rock mass. The history of the Perseverance cave and the expected high levels of stress conditions and stress changes that the B11 excavations were anticipated to undergo required a development methodology that would provide a high level of assurance, both from the design as well as from the implementation points of view. This paper describes the QAQC systems developed and implemented, as well as the practical implementation difficulties and gaps encountered between design and implementation. Variations from the original mine design and scheduling, as well as its impacts are described and evaluated.

Keywords: Leinster, monitoring, seismicity, permit, cave, development

References:
BHP 2018, B11 Project Execution Plan, internal document.
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Hopkins, M 2018, Nickel West Seismic Hazard Management Plan, internal document.
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Thin, I, Windsor, C, Villaescusa, E & Stone, C 2006, ‘Understanding the stress environment for the Perseverance Deeps pre-feasibility study’, in J Hadjigeorgiou & M Grenon (eds), Proceedings of the Third International Seminar on Deep and High Stress Mining, Université Laval, Quebec City, Section 10, 15 p.
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Vidal da Silva, A, 2022a, Leinster Mine Ground Control Management Plan, internal document.
Vidal da Silva, A, 2022b Leinster Mine Support Standards, internal document.




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