Overburden removed Power shovel extracts coal Overburden from new terrace is dumped into the one below Used on hilly or mountainous terrainħ Surface Mining Mountaintop Removal Mountaintops are completely removedĭebris is dumped into the valleys Video (5 min)ĩ Surface Mining Restoration Difficult and usually incomplete ![]() Mineral deposit removed by power shovel Trench filled with overburden Repeated adjacent to initial cut Used on fairly flat terrainĦ Surface Mining Contour strip mining Terraces cut into hillside ![]() Presentation on theme: "Mining."- Presentation transcript:Ģ Surface Mining Machines strip away overburden of soil & rock & usually discards it as waste material (spoil) Used to retrieve shallow mineral depositsģ Surface Mining Open-pit mining-machines dig holes and remove ores such as iron & copper and sand, gravel, & stoneĤ Surface Mining Dredging-chain buckets & draglines scrape up underwater mineral depositsĥ Surface Mining Area strip mining (animation) Overburden stripped away
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