How can an intensive preconditioning concept be implemented at mass mining method? Application to Cadia East panel caving project

Catalan, A., Dunstan, G., Morgan, M., Green, S., Jorquera, M., Thornhill, T., Onederra, I. and Chitombo, G. (2012). How can an intensive preconditioning concept be implemented at mass mining method? Application to Cadia East panel caving project. In: Antonio Bobet, Russ Ewy, Murali Gadde, Joe Labuz, Laura Pyrak-Nolte, Azra Tutuncu and Erik Westman, 46th US Rock Mechanics / Geomechanics Symposium 2012. 46th US Rock Mechanics / Geomechanics Symposium 2012, Chicago, IL, (2040-2051). 24 - 27 June 2012.

Author Catalan, A.
Dunstan, G.
Morgan, M.
Green, S.
Jorquera, M.
Thornhill, T.
Onederra, I.
Chitombo, G.
Title of paper How can an intensive preconditioning concept be implemented at mass mining method? Application to Cadia East panel caving project
Conference name 46th US Rock Mechanics / Geomechanics Symposium 2012
Conference location Chicago, IL
Conference dates 24 - 27 June 2012
Proceedings title 46th US Rock Mechanics / Geomechanics Symposium 2012
Journal name 46th US Rock Mechanics / Geomechanics Symposium 2012
Place of Publication Alexandria, Virginia
Publisher American Rock Mechanics Association
Publication Year 2012
Year available 2012
Sub-type Fully published paper
ISBN 9781622765140
Editor Antonio Bobet
Russ Ewy
Murali Gadde
Joe Labuz
Laura Pyrak-Nolte
Azra Tutuncu
Erik Westman
Volume 3
Start page 2040
End page 2051
Total pages 12
Collection year 2013
Language eng
Formatted Abstract/Summary
Broadly speaking, preconditioning as applied to cave mining is a process conducted prior to the initiation of caving in order to alter the inherent characteristics of the rock mass to enhance caving. To date preconditioning using hydraulic fracturing in particular has been implemented and reported to produce measurable and positive outcomes even though there is still on-going debate on the real impact of preconditioning with respect to cave mining performance. The Newcrest Mining Limited’s Cadia East (CE) underground project is expected to become one of the largest and deepest caving mines in the world and certainly in Australia. In order to make the project economically viable required the application of a large scale and low cost underground mass or cave mining method in order to also achieve the required production rates (26 Mpta). The extraction level of the first CE panel cave (PC1) is located 1200 m below surface and for the second lift (PC2) 1400 m also below surface. At Cadia East Project a novel approach locally designated as “Intensive preconditioning” is being applied, this uses a combination of hydraulic fracturing (in down-holes) and fully confined blasting (in up-holes). This paper describes the work that has been carried out to date and how technical and operational parameters have been assembled and implemented in order to incorporate the intensive pre-conditioning process.  
Subjects 1909 Geotechnical Engineering and Engineering Geology
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Description: 4 volumes (3019 pages) : illustrations (black and white) ; 27 cm.

Document type: Conference Paper
Collections: Non HERDC
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