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  2. Coal mining - Wikipedia

    en.wikipedia.org/wiki/Coal_mining

    Coal mining. Coal 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.

  3. List of deepest mines - Wikipedia

    en.wikipedia.org/wiki/List_of_deepest_mines

    This list of deepest mines includes operational and non-operational mines that are at least 2,212 m (7,257 ft), which is the depth of Veryovkina Cave, the deepest known natural cave in the world. The depth measurements in this list represent the difference in elevation from the entrance of the mine to the deepest excavated point.

  4. Sixteen Tons - Wikipedia

    en.wikipedia.org/wiki/Sixteen_Tons

    Sixteen Tons. " Sixteen Tons " is a song written by Merle Travis about a coal miner, based on life in the mines of Muhlenberg County, Kentucky. [2] Travis first recorded the song at the Radio Recorders Studio B in Hollywood, California, on August 8, 1946. Cliffie Stone played bass on the recording.

  5. History of coal miners - Wikipedia

    en.wikipedia.org/wiki/History_of_coal_miners

    History of coal miners. Coal miner in Wheelwright, Kentucky, 1946. People have worked as coal miners for centuries, but they became increasingly important during the Industrial Revolution when coal was burnt on a large scale to fuel stationary and locomotive engines and heat buildings. Owing to coal's strategic role as a primary fuel, coal ...

  6. Kola Superdeep Borehole - Wikipedia

    en.wikipedia.org/wiki/Kola_Superdeep_Borehole

    Kola Superdeep Borehole. The Kola Superdeep Borehole SG-3 (Russian: Кольская сверхглубокая скважина СГ-3, romanized: Kol'skaya sverkhglubokaya skvazhina SG-3) is the deepest human-made hole on Earth, which attained maximum true vertical depth of 12,262 metres (40,230 ft; 7.619 mi) in 1989. [1] It is the result of ...

  7. Glossary of coal mining terminology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_coal_mining...

    A sough is a drainage tunnel to take water from coal mines without the need to pump it to the surface. [1] An example is the Great Haigh Sough. Spoil tip. Gin Pit Colliery 's old spoil tip or rucks. A spoil tip is a pile built of accumulated spoil - the overburden or other waste rock removed during coal and ore mining.

  8. Piedmont Lithium pulls US government loan application as ...

    www.aol.com/news/piedmont-lithium-pulls-us...

    Piedmont was founded in 2016 in Australia and moved its headquarters in 2021 to North Carolina, where it hopes to dig a 500-foot-deep (150-meter-deep) open-pit mine and build one of the largest U ...

  9. Deep sea mining - Wikipedia

    en.wikipedia.org/wiki/Deep_sea_mining

    Deep sea mining is the extraction of minerals from the seabed of the deep sea. The main ores of commercial interest are polymetallic nodules, which are found at depths of 4–6 km (2.5–3.7 mi) primarily on the abyssal plain. The Clarion-Clipperton Zone (CCZ) alone contains over 21 billion metric tons of these nodules, with minerals such as ...

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