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south africa used mining crushers

south africa used mining crushers

Transvaal,South Africa. Coal-mining-induced earthquakes – June 2005 – Geotimes – Geophenomena The method of coalmining usedat Trail Mountain — called longwallmining— induces tremors, not by blasting, but by carving away coal along the length of a seam and allowing the overburden to collapse in areas that have already been mined

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