The conventional approach for open pit mines, in which a series of nested pits are created to determine an optimal mining sequence, was tested using the core module of Whittle and showed not to be readily applicable on dredge mines, because 1) multiple ponds may be created, 2) the depth to be mined for a certain area changes in time and 3) the nested pits expand randomly towards high graded zones. Three implications of the design of a dredge mine were found to be crucial for optimizations, namely: 1) depth control, 2) mining direction and 3) creation of multiple ponds. The development of dredging as a major player for surface mine applications has led Royal IHC, a large equipment supplier and consultant for dredging and mining operations, and the TU Delft to work on more advanced optimizations techniques for the design of dredge mines. Implications of dredge mine design on mine optimizations and discussing possible approaches
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