Open-pit mining - WikipediaOpen-pit, open-cast or open cut mining is a surface mining technique of extracting rock or . Open-pit mines are used when deposits of commercially useful minerals or rocks are found near the surface; . These benches are usually on four to sixty meter intervals, depending on the size of the machinery that is being used.machines used in open pit mining,FAMUR - Machinery for Underground and Open-Pit Mines - Mining .FAMUR Group is a world-renowned manufacturer of mining machinery and . of various types of bulk materials used in underground mines, open pit mines, sea.
machines used in open pit mining