Decision Making In Mining Operations - Inaccurate Timely Data,
Accurate Tardy Data
Author(s)
J. E. Everett
Abstract
Decision making in mining operations -
inaccurate timely data, accurate tardy data
J. E. ~verett'
I School of Business, University of Western Australia.
Abstract
Iron ore shipments need to be within tolerance of a target composition, not only
in iron, but also silica, alumina and phosphorus. Ships are loaded from
stockpiles, built from trainloads from the mine. Mine faces are dug each day to
bring the smoothed grade back to target. This decision uses assays of material
sampled when the blast holes are drilled. The assays have large errors. Assays at
the port are more accurate, but too late for the selection decision. Our system
uses feedback from port train assays to adjust blast hole assays for material not
yet mined. This has improved the daily selection of mining faces, and thus the
quality and value of shipped ore. Further improvement is discussed. The model
was developed in close cooperation with users, enabling the computer to do what
it is good at, releasing humans to spend more time doi
Keywords
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