Open-pit mining

Explain subsurface mining. Include explanations for: room-and-pillar mining; longwall mining and solution mining .

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Mining Explain subsurface mining. Include explanations for: room-and-pillar mining; longwall mining and solution mining . Explain surface mining. Include explanations for: open-pit mining; surface coal mining;quarrying; solar evaporation. Explain placer mining,hydraulic mining,smelting and undersea mining.