Methods of Gold Mining - Geology InGold mining is the process of mining of gold or gold ores from the ground. There are several techniques and processes by which gold may be extracted from the

Data mining WikipediaData mining is the computing process of discovering patterns in large data sets involving methods at the intersection of machine learning, statistics, and database ...Coal

Glossary of Mining Terms Rock, Mineral and Fossil ...Back — The roof or upper part in any underground mining cavity. Backfill — Mine waste or rock used to support the roof after coal remova

Coal mining WikipediaCoal mining is the process of extracting coal from the ground. Coal is valued for its energy content, and, since the 1880s, has been widely used to generate electricity.min