Mining - Wikipedia
WebMining is the extraction of valuable geological materials and minerals from the surface of the Earth. Mining is required to obtain most materials that cannot be grown through agricultural processes, or feasibly created artificially in a laboratory or factory.
Mining in the United States - Wikipedia
WebMining in the United States has been active since the beginning of colonial times, but became a major industry in the 19th century with a number of new mineral discoveries causing a series of mining rushes. In 2015, the value of coal, metals, and industrial minerals mined in the United States was US$109.6 billion. 158,000 workers were directly ...
Coal mining - Wikipedia
WebCoal mining is the process of extracting coal from the ground or from a mine. Coal is valued for its energy content and since the 1880s has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production.
Environmental effects of mining - Wikipedia
WebEnvironmental effects of mining can occur at local, regional, and global scales through direct and indirect mining practices. Mining can cause erosion, sinkholes, loss of biodiversity, or the contamination of soil, groundwater, and surface water by chemicals emitted from mining processes.
Mining | Definition, History, Examples, Types, Effects, & Facts
WebApr 22, 2024 · mining, process of extracting useful minerals from the surface of the Earth, including the seas. A mineral, with a few exceptions, is an inorganic substance occurring in nature that has a definite chemical composition and distinctive physical properties or molecular structure.
Mining - Simple English Wikipedia, the free encyclopedia
WebMining is the process of digging things out of the ground. Any material that cannot be grown must be mined. Mining things from the ground is called extraction. Mining can include extraction of metals and minerals, like coal, diamond, gold, …
Mining - National Geographic Society
WebOct 19, 2023 · Mining is the process of extracting useful materials from the earth. Some examples of substances that are mined include coal, gold, or iron ore. Iron ore is the material from which the metal iron is produced. The process of mining dates back to prehistoric times.
Gold mining - Wikipedia
WebGold mining is the extraction of gold by mining. Historically, mining gold from alluvial deposits used manual separation processes, such as gold panning. The expansion of gold mining to ores that are not on the surface has led to more complex extraction processes such as pit mining and gold cyanidation. In the 20th and 21st centuries, most ...
Mining engineering - Wikipedia
WebMining in the engineering discipline is the extraction of minerals from the ground. Mining engineering is associated with many other disciplines, such as mineral processing, exploration, excavation, geology, metallurgy, geotechnical engineering and surveying.
Deep sea mining - Wikipedia
WebDeep sea mining is the extraction of minerals from the ocean floor at depths of 200 metres (660 ft) [2] [3] to 6,500 metres (21,300 ft). [4] [5] [6] Deep-sea mining uses hydraulic pumps or bucket systems that carry deposits to the surface for processing. The environmental impact of deep sea mining is controversial.
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