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Coal Research and Development to Support National Energy Policy (2007) / Chapter Skim
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Appendix E: Coal Mining and Processing Methods
Pages 160-166

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From page 160...
... Appendix E Coal Mining and processing Methods T his appendix presents additional details on the individual processes that are involved in extraction of coal from surface and underground mines, and the subsequent beneficiation of the coal in coal processing plants to produce a final product. COAL MININg METHODS Surface Mining In surface mining, the ground covering the coal seam (the overburden)
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From page 161...
...  APPENdIX E outside the mining area for placement and storage. In the Midwest, where the surface topography and coal seams are generally flat, it is common to employ area strip mining in which the fragmented overburden is placed directly by large draglines in the space created where coal has been mined (figure E.1)
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From page 162...
...  CoAL RESEARCh ANd dEvELoPmENt FIguRE E.2 Schematic showing underground coal mine workings. The coal seam is accessed by both a slope and a shaft, shown on the right.
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From page 163...
...  APPENdIX E conventional room and pillar method, several pieces of equipment are used in sequence at a working face to extract the coal. These unit operations include the undercutting, drilling, blasting, loading and roof bolting operations.
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From page 164...
...  CoAL RESEARCh ANd dEvELoPmENt ("waste coal" or "gob" piles) particularly in the eastern states.
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From page 165...
...  APPENdIX E • Coal drying. Coal preparation plants that employ fine coal cleaning by froth flotation can produce an unacceptable amount of moisture in the product.
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From page 166...
...  CoAL RESEARCh ANd dEvELoPmENt five years to 2005 (fiscor, 2005)
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