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Coal is the major source of energy in China In 2011 the Chinese coal production was equivalent to 3,576 Mt × 0522 toe/t × 11630 MWh/toe = 21,709 TWh Assuming the same caloric value for the imported coal the net coal energy .

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Auger mining is a surface mining technique used to recover additional coal from a seam located behind a highwall produced either by stripping or open-pit mining Auger mining is especially employed when contour strip mining has .

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History of coal mining - Wikipedia, the free encyclopedia

The history of coal mining goes back thousands of years It became important in the Industrial Revolution of the 19th and 20th centuries, when it was primarily used to power steam engines, heat buildings and generate electricity Coal .

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