De difficulty faced here is mining ore on day shift only. Ya...

De difficulty faced here is mining ore on day shift only. Ya doesn’t mine ore on night shift, which makes feeding a hungry mill from an increasingly small hole a challenge. Open pit mining’s mostly two dimensional. And ya has spotters - de most important blokes in de pit - watching every bucket load. 777’s and a 200t machine. Blocking from blast hole samples don’t cut it. Ya gots to use RC grade control and even dat’s shaky. If the geos figure out a periodicity on the shoots, then the engineer’s got a chance of scheduling the thing. And always, a hungry mill in the background, unless ya can slow it down somewhat but then it’s a question of fixed costs against grade and productivity.