Value engineering of a panel cave mining strategy under geotechnical constrains – a hypothetical case study

Silva, Diego, Cavieres, P. H. and Gándara, P. E. (2016). Value engineering of a panel cave mining strategy under geotechnical constrains – a hypothetical case study. In: Proceedings of the 9th International Copper Conference, Kobe, Japan. Copper 2016, Kobe, Japan, (51-61). 13-16 November 2016.

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Author Silva, Diego
Cavieres, P. H.
Gándara, P. E.
Title of paper Value engineering of a panel cave mining strategy under geotechnical constrains – a hypothetical case study
Conference name Copper 2016
Conference location Kobe, Japan
Conference dates 13-16 November 2016
Convener Copper 2016
Proceedings title Proceedings of the 9th International Copper Conference, Kobe, Japan
Place of Publication Kobe, Japan
Publisher The Mining and Materials Processing Institute of Japan
Publication Year 2016
Sub-type Fully published paper
Open Access Status Not yet assessed
Start page 51
End page 61
Total pages 11
Collection year 2017
Language eng
Abstract/Summary 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 extraction sequence includes where to start cave initiation or undercutting. The objective of this paper is to present a way to assess the extraction sequence, through a case study with two scenarios by considering aspects from both mine planning and geomechanics. The first scenario was to initiate the sequence from a zone with higher grades, but required effectively the development of a new mining block under a high column height. The second scenario was to initiate 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 much longer as the extraction rates would be much slower in order to reduce risks associated with high extraction rates including seismicity. On the second option there is a minimum risk associated to 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 paper discusses the methodology applied to a pre-feasibility case study, as well as the main conclusions and recommendations.
Keyword Cave mining
Underground mining
Value Engineering Methodology
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes www.copper2016.jp

Document type: Conference Paper
Collections: W.H. Bryan Mining Geology Research Centre
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Created: Tue, 14 Feb 2017, 11:51:43 EST by Diego Silva Calquin on behalf of School of Mechanical and Mining Engineering