Sensitivity analysis on production scheduling and draw control strategies for the Carrapateena block cave

Authors: Shekhar, G; Chauvier, C; Fargher, M

DOI https://doi.org/10.36487/ACG_repo/2435_E-02

Cite As:
Shekhar, G, Chauvier, C & Fargher, M 2024, 'Sensitivity analysis on production scheduling and draw control strategies for the Carrapateena block cave', in Daniel Johansson & Håkan Schunnesson (eds), MassMin 2024: Proceedings of the International Conference & Exhibition on Mass Mining, Luleå University of Technology, Luleå, pp. 715-727, https://doi.org/10.36487/ACG_repo/2435_E-02

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Abstract:
The paper provides a holistic approach for assessment of proposed production schedules and draw controls strategies at the Carrapateena block cave 1 (BC1) through analysis of Key Performance Indicators (KPI’s). It highlights the use of first principles approach along with simulations and statistical analysis to identify the KPI’s for the planned Carrapateena BC1. Simulation is referred in this paper as Personal computer Block cave (PCBC) production scheduling process. Literature review and benchmarking was performed to create a comprehensive list of KPI’s relevant for production scheduling and draw control. Simulation was performed for varied mining constraints to understand the mine performance through mine physical outputs such as tons and grades profile, drawpoint shut-off height of draw, draw rates profile for the footprint. Sensitivity analysis is then performed on selected parameters to understand their impact on mine performance. Factors such as minimum draw rates, production rate curves, drawbell length, and draw cone dimensions were varied and their impact on production schedule for the planned block cave were calculated. The planned Carrapateena BC1 will be established in a high stress environment at a depth of 1.5km (approx.) with a steady state production target of 12mtpa.

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