Перевести на . 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).
