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2 MINING SECTION

2.1 Selection of Mining

The considered Deposit is presented by nine dissociated thin and high dipping ore bodies with small (110-450 m) strike length (ref. Table 1.2) and vertical extent from 200 to 450 m. The surface relief is low mountain-type with even watersheds; the deposit reserves are partially located in the Valley of Aliya River, where there is significant thickness of friable deposits.
Possibility for open-cast and combined mining is reviewed in Attachment G.
Estimated marginal stripping ratio ( ) only for open-cast mining is from 8,8 m3/t to 16,16 m3/t, excluding 3-bis Vein ( ) (Table G.1 Attachment G). When processing of thin ore bodies (even the upper layers) of the Deposit with open-cast mining the stripping ratio exceeds the value of marginal stripping ratio. This concludes that only the open-cast mining of all reserves of the Deposit is not profitable.
With combined mining the location between the open and underground mining is determined by the marginal stripping ratio ( ) calculated value of which totals 2.15 m3/t. Only insignificant part of reserves can be mined with stripping ratio below (open cast mining) (contour stripping ratio of the second bench is more than 10 m3/t. Ref. Table G1, Attachment G).