In a sublevel caving mine, the ore recovery, side rock dilution and the total ore extraction rate are determined and controlled at the draw point. The decision to stop loading at a drawpoint and continue blasting the next fan is critical. Abandonment of the draw point too early leads to ore losses and inefficient use of ore resources. On the other hand, closing a draw point too late leads to increased side rock dilution and increased production costs. The purpose of this paper is to evaluate the used technique for draw control and the potential for increasing the loading level efficiency using available data sources as well as other types of information from the Luossavaara Kiirunavaara AB (LKAB) mines.
ISBN för värdpublikation: 978-0-367-42284-4, 978-0-367-82317-7