How Underground Mining Works. by Julia Layton. NEXT PAGE . Miners enjoy a lunch break in the makeshift crib rooms at one of Illawarra Coal's underground mines in Australia. ... Deep beneath the surface of the Earth lie some of the most frightening factories in the world: underground mines.
Open cast mining is a type of surface mining in which mineral resources are removed from the earth through large holes or pits dug into the surface. The term "open cast mining" is used most commonly in Great Britain. In the United States, open cast mining is usually called openpit or opencut mining.