Surface Mining
1. Strip
mining- used when coal is near the surface or overburden is
unstable; as mining process, the overburden is placed in the previous mine
cavity.
2. Contour
mining- a type of strip mining; follows contour of a hill leaving a
terrace in mountainside.
3.
Mountaintop mining- tops of hills are removed
to access horizontal coal seams; overburden is pushing to areas between high
elevations; follows reclamation; most controversial mining method.
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