depth of mining
21coal mining — Coal was very important in the economic development of Britain. It was used as fuel in the factories built during the Industrial Revolution and continued to be important until the 1980s. The main coalfields are in north east England, the north… …
22Coal mining — Men leaving a UK colliery at the close of a shift Surface coal mining in Wyo …
23Underground mining (hard rock) — A three dimensional model of an underground mine with shaft access Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, mainly those containing metals[1] such as ore containing gold …
24Dartmoor tin-mining — The wheelpit at Huntingdon mine The Dartmoor tin mining industry is thought to have originated in pre Roman times,[1] and continued right through to the 20th century. From the 12th century onwards tin mining was regulated by a Stannary Parliament …
25Deep sea mining — is a relatively new mineral retrieval process that takes place on the ocean floor. Ocean mining sites are usually around large areas of polymetallic nodules or active and extinct hydrothermal vents at about 1,400 3,700 meters below the ocean’s… …
26History of coal mining — Due to its abundance, coal has been mined in various parts of the world throughout history and continues to be an important economic activity today. Compared to wood fuels, coal yields a higher amount of energy per mass and could be obtained in… …
27Nickel mining in New Caledonia — A creek in southern New Caledonia. Red colours reveal the richness of the ground in nickel and iron oxides Location …
28Borehole mining — (BHM) is a remote operated method of extracting (mining) mineral resources through boreholes by means of high pressure water jets. This process can be carried out from land surface, open pit floor, underground mine or floating platform or vessel… …
29Newmont Mining Corporation — Type Public (NYSE: NEM, TSX: NMC) …
30Mountaintop removal mining — Mountaintop removal site Mountaintop removal in Martin County, Kentucky M …
