Mining is extraction of valuable minerals or other geological materials from the earth usually from an orebody, lode, vein, seam, reef or placer deposits.
Open cast mining. Opencast mine. Essentially, overburden is removed, the exposed ore is recovered, and the pit is filled, progressively, by the next tranche of ...
The two main
A look at various mining methods and
Kentucky has two distinct coal fields, each containing numerous deposits of bituminous coal of various characteristics and mines of every type and size.
During the seventeenth century 'Bells Pits' was the type of mining used. This consisted of bore holes being dug into the ground to search for coal. Shafts were ...