Many coal mines use explosives to loosen the rock and coal. In surface mining, holes are drilled through the overburden, loaded with explosives, and discharged, shattering the rock in the overburden. In one underground mining method, the coal is blasted off the bed without any undercutting to help break it down.
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Hitachi's EX80006 frontloading shovel is mostly used for removing overburden or backing up electric rope shovels, says Brian Mace, manager of mining product marketing and applications, noting six machines are currently operating in the oil sands.
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Mining is one of Canada's primary industries and involves the extraction, refining, and/or processing of economically valuable rocks and minerals. Mineral products – including gold, silver, iron, copper, zinc, nickel – are critical to modern industrial society.
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