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  2. Underground hard-rock mining - Wikipedia

    en.wikipedia.org/wiki/Underground_hard-rock_mining

    There are two principal phases of underground mining: development mining and production mining. Development mining is composed of excavation almost entirely in (non-valuable) waste rock in order to gain access to the orebody. There are six steps in development mining: remove previously blasted material (muck out round), scaling (removing any unstable slabs of rock hanging from the roof and ...

  3. Speculator Mine disaster - Wikipedia

    en.wikipedia.org/wiki/Speculator_Mine_disaster

    The Granite Mountain/Speculator Mine disaster of June 8, 1917, occurred as a result of a fire in a copper mine, and was the most deadly event in underground hard rock mining in United States history. Most men died of suffocation underground as the fire consumed their oxygen; a total of 168 miners were killed.

  4. Willow Creek mining district - Wikipedia

    en.wikipedia.org/wiki/Willow_Creek_mining_district

    The Willow Creek mining district, also known as the Independence Mine/Hatcher Pass district, is a gold-mining area in the U.S. state of Alaska. Underground hard-rock mining of gold from quartz veins accounts for most of the mineral wealth extracted from the Hatcher Pass area. The first mining efforts were placer mining of stream gravels, and ...

  5. Mining accident - Wikipedia

    en.wikipedia.org/wiki/Mining_accident

    A mining accident is an accident that occurs during the process of mining minerals or metals. Thousands of miners die from mining accidents each year, especially from underground coal mining, although accidents also occur in hard rock mining.

  6. Category:Underground mining - Wikipedia

    en.wikipedia.org/wiki/Category:Underground_mining

    Underground hard-rock mining; Underground soft-rock mining; W. Whim (mining) Winze This page was last edited on 3 September 2017, at 18:24 (UTC). Text is available ...

  7. This tiny section of the US Southeast could hold enough ...

    www.aol.com/tiny-section-us-southeast-could...

    Brine loss through mining can impact ecosystems and communities. Although, it is much less energy intensive than traditional hard rock mining. New methods of extraction are currently being tested.

  8. Trump move opens Utah to Gold Rush-style mining claims under ...

    www.aol.com/news/2018-01-31-trump-move-opens...

    Unlike laws governing petroleum extraction, there are no environmental guidelines specific to hard rock mining, and no requirement to pay a royalty. The claims provide prospectors mineral rights ...

  9. 15 Biggest Lithium Mining Companies in the World - AOL

    www.aol.com/news/15-biggest-lithium-mining...

    Lithium is mainly sourced from hard-rock mines or underground brine reservoirs. The former is usually in Australia, while the latter are found in South American countries Argentina and Chile.