Comparison between the application of the conventional mine planning and of the direct block scheduling on an open pit mine project.
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Date
2018
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Abstract
Historically, since the 60's, traditional mine planning consists of several distinct
stages:
1) Definition of the ultimate pit - the portion of the blocks that results in the
greatest total value;
2) Pushback selection - based on the generation of nested pits, obtained with the
change in the value of the ore price;
3) Long-term production scheduling.
Although considered quite satisfactory, this methodology presents some flaws:
The stages, even if considered individually optimal, may not be when put together. The
opportunity cost is not considered and the cut-off is fixed.
Due to the recent computational advances, a new technique has been growing
and is more reliable: the direct block sequencing. In this methodology, the steps are
consolidated into only one process, improving the economic results, reducing the total
execution time and obtaining, in fact, an optimal planning.
The aim of this work is to compare the results of the two planning methods applied
in a database of a Brazilian iron ore mine and to show the real advantages and
disadvantages of each one. To solve the direct block sequencing technique, Doppler
was used, a tool developed by Delphos Mine Planning Laboratory, located at the University
of Chile. The traditional methodology was executed through Whittle software.
Lastly, a medium-term scheduling was performed using Deswik software.
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Production scheduling
Citation
CAMPOS, P. H. A. et al. Comparison between the application of the conventional mine planning and of the direct block scheduling on an open pit mine project. REM - International Engineering Journal, v. 71, p. 269-274, 2018. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2018000200269>. Acesso em: 12 fev. 2019.