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is coal crushed in beirutn mining in america
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is coal crushed in beirutn mining in america

Sep 21, 2020 Surface coal mining involves: removing parts or all of mountaintops to expose buried seams of coal, and. interburden (rock between coal seams). Overburden and interburden are disposed of in adjacent valleys because the broken rock will not all fit back into the mining pit, and disposal alternatives are limited.

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