DBPapers

LONG TERM PRODUCTION SCHEDULING OF OPEN PIT MINES, A REVIEW OF OLD AND NEW ALGORITHMS

AUTHOR/S: S. M. ALI HOSSEINI, R. KAKAIE, M. ATAEI
Sunday 1 August 2010 by Libadmin2008

8th International Scientific Conference - SGEM2008, www.sgem.org, SGEM2008 Conference Proceedings/ ISBN: 954-918181-2, June 16-20, 2008, Vol. 1, 477-486 pp

ABSTRACT

Since long term production scheduling deals with movement of ore and waste during
the life of a mine, it has a significant effect on the cash flow of a mining operation.
Therefore, mine planners often seek to optimize the production schedule with respect to
a given criterion. The most commonly used criterion in long term scheduling
optimization is to maximize net present value (NPV). The process involves sequencing
of ore blocks or parcels to be mined in each period over the life of the mine subject to
precedence and other physical constraints imposed by the mining system. According to
literatures there are many production planning algorithms, both heuristic and rigorous,
which lead to near optimum solution. Operation research based techniques can find
optimum solution but number of their binary variables is too many to solve without
simplification. In this paper, production planning problem in hard-rock open pit mining
is presented and some of old and new techniques have been reviewed.

Keywords: Production Scheduling, push back, net present value