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11 de jun. de 2024 · Mining - Underground, Safety, Techniques: When any ore body lies a considerable distance below the surface, the amount of waste that has to be removed in order to uncover the ore through surface mining becomes prohibitive, and underground techniques must be considered.
Underground hard-rock mining refers to various underground mining techniques used to excavate "hard" minerals, usually those containing metals, such as ore containing gold, silver, iron, copper, zinc, nickel, tin, and lead.
Learn how Anglo American uses different mining techniques to extract various products from the ground, such as coal, platinum, diamonds and copper. Find out the advantages, challenges and examples of each method, including underground mining with room and pillar, narrow vein stoping and large-scale mechanised mining.
19 de oct. de 2023 · Learn about the process and history of mining, the extraction of useful materials from the earth. Find out the differences between surface mining and underground mining, and the impacts of mining on people and the environment.
13 de jul. de 2021 · Underground mines account for 40 percent of global mining operations across numerous commodities and deposit types and employ a variety of mining methods across a broad geographical distribution, and with a wide range of labor productivity and costs.
13 de may. de 2021 · Actualmente, la mina subterránea más profunda del mundo es la mina de oro Mponeng ubicada en Sudáfrica. ¡En 2019, el Mponeng produjo 244,000 onzas de oro! A partir de 2020, la profundidad operativa osciló entre 3.16 km y 3.84 km por debajo de la superficie.
Underground mining methods become necessary when the stripping ratio becomes uneconomical, or occasionally when the surface use of the land would prohibit surface mining. Underground methods are traditionally broken into three classes: unsupported, supported, and caving methods.
