Implementation of leading practice in geotechnical and blasting performance evaluations and the Centinela sulphide mine

Catalan, A. and Onederra, I A. (2015) Implementation of leading practice in geotechnical and blasting performance evaluations and the Centinela sulphide mine. Mining Technology, 1-18. doi:10.1179/1743286315Y.0000000025


Author Catalan, A.
Onederra, I A.
Title Implementation of leading practice in geotechnical and blasting performance evaluations and the Centinela sulphide mine
Journal name Mining Technology   Check publisher's open access policy
ISSN 1474-9009
1743-2863
Publication date 2015
Sub-type Article (original research)
DOI 10.1179/1743286315Y.0000000025
Open Access Status Not Open Access
Start page 1
End page 18
Total pages 18
Place of publication Abingdon, Oxfordshire, United Kingdom
Publisher Taylor & Francis
Collection year 2016
Language eng
Abstract The Centinela sulphide mine (formerly known as Esperanza Mine) is an open pit sulphide deposit located in Chile's Antofagasta Region, 1350 km North of Santiago. One of the strategic objectives of the mine is to implement productivity improvement projects that can be monitored, adequately quantified and adhere to strict geotechnical requirements. This paper describes the implementation of leading practices to evaluate geotechnical and blasting performance. An approach based on direct measurements was developed and implemented at the mine site. The process involved measurements of near-field accelerations and gas penetration behind pre-split-lines; run of mine (ROM) fragmentation analysis and geotechnical evaluations based on the reconciliation of key geotechnical design parameters, such as bench face angle, berm width, inter-ramp angles and final slope characteristics. A geotechnical evaluation matrix was introduced to rank final results at each monitored location. From a geotechnical perspective, the best results were obtained with some of the lowest powder factor blasts monitored. Fragmentation assessment results showed that plant requirements were still being achieved at these lower powder factors. This helped confirm that in the rock mass domains of interest, reduced powder factors in production rows were more appropriate in order to maintain higher standards of quality in wall control practices.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2016 Collection
 
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Created: Tue, 02 Feb 2016, 15:36:34 EST by Rose Clements on behalf of School of Mechanical and Mining Engineering