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What is the difference between open-pit mining and underground mining?

Apr 22, 2011 · Open Pit Mining Pros & Cons. Open pit mining ... One of the major benefits to open pit mining is the increase in efficiency over deep-shaft mining techniques.

Open-cut mining . In open-cut mining, surface rocks and layers of earth are stripped away using enormous earth shifters. Over a period of time, the mine is excavated in a series of layers, known as benches. Safety levels are established at various intervals within the mine to reduce the risk of rock falls.

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Occasionally, ore bodies sufficiently close to the surface made open pit or open cast mining practical. Often regarded as a twentieth-century approach, ... About ONE ...

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Although surface mining reduces production costs and poses fewer health dangers to miners compared to underground mining, surface mining also requires blasting into rock and changing the landscape, increasing the risk of mountainside erosion, mudslides and compaction of the soil.

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Open-pit mining - Wikipedia, the free encyclopedia. Open-pit mining, open-cut mining or opencast mining is a surface mining technique of extracting rock or minerals ...

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18/08/2008· The difference between an open pit mine and a quarry is that a quarry uses the mined product "as is" without milling and extraction, such as limestone, gypsum, bentonite, gravel etc. A mine usually refers to metals like gold or copper being recovered from ore once it has been mined.