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under ground vs open pit glass mining in slovakia

Sep 01, 2016 There are other examples which may be taken into consideration, such as establishing a mining area Mutěn n with a surface area of 12.40 ha producing up to 100,000 t/year of raw feldspar (2013, open-pit, rock materials) which in Slovakia and in the Czech Republic (according to the combined EIA procedure for a new mining area and for its ...

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