DBPapers
DOI: 10.5593/SGEM2015/B13/S3.094

THE UNROLLING METHOD AS A TOOL FOR ORE RESERVES ESTIMATION IN DEPOSITS OF VARIABLE DIP

D. Drymonitis
Friday 7 August 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-33-9 / ISSN 1314-2704, June 18-24, 2015, Book1 Vol. 3, 719-726 pp

ABSTRACT
In the mining industry it is common knowledge and practice that ore-bodies which are explored and exploited do not usually have simple shapes, stationary thickness, strike and dip. Even tabular ore-bodies, which are supposed to have the simplest shapes, usually present variable dips, a fact that makes reserves calculations more complex.
To meet the need of simpler ore reserves estimations in these cases the technique known as “unrolling of dipping ore-bodies” has been developed. The method “unrolls” ore-bodies of variable dip on a single plane and makes the simplification of all calculations and evaluations possible.
This paper presents the method with all the relevant mathematical calculations to provide all those involved in ore reserves estimations or similar problems with a simple solution to the problem.

Keywords: Unrolling, dipping ore-bodies, projection, variable dip.