development rock

development rock

[də′vel·əp·mənt ‚räk]
(mining engineering)
Rock containing both barren and valuable rock, broken during development work.
References in periodicals archive ?
During the 2018 field season, Trilogy completed twenty-five drill holes and a number of test pits to gather geotechnical information for the mill, tailings, and development rock disposal sites.
The crushed product will improve the gradation of the development rock used.
When that is achieved, Kiruna expects to be operating just 10-12 large LHDs dedicated to production, with about four smaller units for clearing development rock. Today the mine operates 22 LHDs.
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