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Open-pit mining, also known as open-cast or open-cut mining and in larger contexts mega-mining, [1] is a surface mining technique that extracts rock or minerals from the earth. Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface where the overburden is relatively thin. In contrast, deeper mineral ...
Coal extraction methods vary depending on whether the mine is an underground mine or a surface (also called an open cast) mine. Additionally, coal seam thickness and geology are factors in the selection of a mining method. The most economical method of coal extraction for surface mines is the electric shovel or drag line.
Video editor as part of Opencast 9's administration user interface. Opencast (formerly known as Opencast Matterhorn) is a free, open-source software for automated video capture, processing, managing, and distribution, mainly for academic institutions. Opencast is built by a community of developers in collaboration with universities and ...
The Siilinjärvi carbonatite complex, [1] an open-pit mine owned by Yara International, in Siilinjärvi, Finland Coal strip mine in Wyoming. Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit (the overburden) are removed, in contrast to underground mining, in which the ...
Drilling and blasting is the controlled use of explosives and other methods, such as gas pressure blasting pyrotechnics, to break rock for excavation. It is practiced most often in mining , quarrying and civil engineering such as dam , tunnel or road construction.
The furnace is tapped in the same way a blast furnace is tapped; a hole is drilled in the side of the hearth and the raw steel flows out. Once all the steel has been tapped, the slag is skimmed away. The raw steel may be cast into ingots, a process called teeming, or it may be used in continuous casting in the rolling mill. [4]
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French Blasting Gallery Method 1986 Walking Dragline 1983 Long Wall Mining: 1981 Load Haul Dumpers and Headers 1979 Side Discharge Loaders 1975 Open Cast Mining: 1954 Flame Proof Electric Equipment 1953 Electric Cap Lamps 1951 Electric Coal drills 1948 Machine Mining (Joy loader and Shuttle cars)