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Coal Mining Methods Underground Mining Longwall Room and Pillar Mining Longwall mining and roomandpillar mining are the two basic methods of mining coal

9 Figure 33. Types of coal 87 Figure 34. Opencut coal mining 91 Figure 35. Longwall mining 92 Figure 36. Coalfired power plant schematic ...

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Coal and oil shale. When applied to coal mining tailings ponds and oil sands tailings ponds, the term "tailings" refers to fine waste suspended in water.