impacts of opencast mining of lineFeb 14, 2016 . Coal is mined by two methods: surface or impact of open cast coal mining . Random Articles. salt Opencast Metal Mining Methods Line.opencast metal mining methods line,Traditional Surface Mining Methods – EXCELLENCE IN MINING .Jul 23, 2016 . Many metals are mined by the open pit technique: gold, silver and copper, to name a few. . Dimension stone such as flagstone, granite, line, marble, . Strip mining: “Open-cast mining” techniques relate to the extraction.
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