As pits turned further—the deepest pits on earth exceed 800 metres (two,600 feet)—alternate modes of transporting damaged ore and waste rock grew to become much more common. A person of such would be the belt conveyor, but generally speaking this technique calls for in-pit crushing of the run-of-mine material prior https://finnuzdgh.ltfblog.com/36330861/details-fiction-and-mining-output