Mining & The Extraction of Metals
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... ineral has been removed, another strip next to the original one is excavated and the waste material deposited in the first strip. Strip mining is usually used in cases of long, flat deposits of coal.
Quarrying
Traditionally quarrying involved the excavation of large blocks of stone and raw minerals for ornamental use. This requires expensive machinery and special procedures. Today, the term quarrying has been applied to the mining of sand, gravel, and crushed stone for the production of roads, cement, concrete, etc. The processes used in this type of quarrying are very similar to those used in open pit mining.
The first step in the design of an open-pit mine is to find the reserves. As explained in section one, the positions of deposits are found using pro ...
