mining and geological and mining conditions of the iron ore pits in the mining of rocks
with a coefficient of strength up to f = 15, in the presence of a variety of inclusions
with a significant strength coefficient in the rock massif f > 20 on the scale of
M.M. Protodiakonov at given technological parameters of elements of the system of
development and norms of the operating technology for the development of iron ore
pits.
The presented method of developing the ledge without performing drilling and
blasting operations while conducting an open exploration of iron ore deposit with the
use of mill type mills with direct loading in an dump truck allows to improve the
technical and economic performance of iron ore pits and reduce the cost of working
out of iron ore deposits up to 46%.
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