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2. Bucyrus-Erie - Wikipedia

   en.wikipedia.org/wiki/Bucyrus-Erie

   Bucyrus-Erie was an American surface and underground mining equipment company. It was founded as Bucyrus Foundry and Manufacturing Company in Bucyrus, Ohio, in 1880.Bucyrus moved its headquarters to South Milwaukee, Wisconsin, in 1893.

3. Normet - Wikipedia

   en.wikipedia.org/wiki/Normet

   Normet is a private Finland-headquartered, global technology company.The company manufactures underground equipment and applications and provides aftermarket services, construction chemicals, and rock support products and expertise for customer processes in underground mining and tunnelling as well as for civil construction industries.

4. Joy Global - Wikipedia

   en.wikipedia.org/wiki/Joy_Global

   The company marketed equipment to underground mine operations using the “Joy” products trademark. [24] Surface mining equipment is marketed using the “P&H” products trademark. [25] Joy Global's underground business received 90% of its revenue from coal projects, [2] and from the manufacture of underground mining equipment. [26]

5. 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 ...

6. Rocker Shovel Loader - Wikipedia

   en.wikipedia.org/wiki/Rocker_Shovel_Loader

   An engraved copper plaque next to the Rocker Shovel at Bingham Canyon Mine. EIMCO 12B in the passing loop at Lea Bailey Light Railway.. A Rocker Shovel Loader, sometimes simply referred to as a Rocker Shovel or Mucker is a type of mechanical loader used in underground mining.

7. Underground soft-rock mining - Wikipedia

   en.wikipedia.org/wiki/Underground_soft-rock_mining

   Underground soft-rock mining is a group of underground mining techniques used to extract coal, oil shale, potash, and other minerals or geological materials from sedimentary ("soft") rocks. [1] Because deposits in sedimentary rocks are commonly layered and relatively less hard , the mining methods used differ from those used to mine deposits in ...