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open cast mining essentially overburden is removed the exposed ore is recovered and the pit is filled progressively by the next tranche of overburden

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other toxic compounds are used and generated in the mining process as well mining exposes previously buried metal sulfides to atmospheric oxygen causing their

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mining in south africa plays an important role in the development and history of south africa gold mining accounts for over 10 of the worlds gold production

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research resources and research tools by marcus p zillman

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surface mining author alan cluett environmental consultant holcim south africa article type explanation mining by its very nature is not sustainable into

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hazards magazine and whin workers 39 health international newsletter provide occupational health and safety information facts and features for the benefit of workers

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mining is the extraction of valuable minerals or other geological materials from the earth usually from an orebody lode vein seam reef or placer deposits

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fig 1 above shows an illustration of a open pit surface mine the definition of a open pit mine is quot an excavation or cut made at the surface of the

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surface mining when an ore bed has been located relatively close to earth 39 s surface it can be mined by surface techniques surface mining is generally a

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