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

by

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.