(1) In open cast workings the benches formed shall be so arranged that the benches in ore/mineral and overburden are separate so as to avoid mixing of waste with the ore/minerals.
(2) The benches in overburden shall be kept sufficiently in advance so that their workings do not interfere with the working of ore/minerals.
______________________________________________________________________________ 1 Inserted by G.S.R. 55 (E), dated 17.1.2000. 2 Ibid.
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(3) Orientation of the workings and sequence of mining operations shall be such that different grades of ore/ minerals can be obtained simultaneously for blending with a view to achieve optimum recovery of ore/minerals from the deposit.