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Conference Proceedings

Seventh International Conference & Exhibition on Mass Mining (MassMin 2016)

Conference Proceedings

Seventh International Conference & Exhibition on Mass Mining (MassMin 2016)

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Selecting an Extraction Sequence of a Panel Caving Operation from a Geotechnical Perspective - a Case Study

The extraction sequence strategy in panel caving operations is dependent on a number of often conflicting parameters, which are either economical or technical. In this context, the extraction sequence includes where to start cave initiation or undercutting.This work presents an approach to assess the extraction sequence, through a case study with two scenarios, by considering aspects from both mine planning and geomechanics. The first scenario initiates the sequence from a zone with higher grades, but requires the development of a new mining block under a high column height. The second scenario initiates the sequence from a zone with lower grades, but adjacent to an exhausted mining block and under lower in situ column height.Based on existing mining guidelines, the ramp-up period of the first scenario would be longer as the extraction rates would be slower in order to reduce risks associated with high extraction rates, such as seismicity. On the second option there is a minimum risk associated with the same guidelines, given that the caving status is already connected to surface, which would allow for higher extraction rates.Two different mining plans were developed for each sequence, as well as a technical and economic assessment to compare both scenarios in terms of financial indicators (net present value and internal rate of return), in order to select the best alternative.This work discusses the methodology applied to a prefeasibility case study, as well as the main conclusions and recommendations.CITATION:Silva, D, 2016. Selecting an extraction sequence of a panel caving operation from a geotechnical perspective - a case study, in Proceedings Seventh International Conference and Exhibition on Mass Mining (MassMin 2016), p 894 (The Australasian Institute of Mining and Metallurgy: Melbourne).
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  • Published: 2016
  • PDF Size: 0.5 Mb.
  • Unique ID: P201602102

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