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Solutions To Roof Collapse Coal Mining

2020-6-19The majority of coal produced in Illinois comes from from coal seams that lie 200 feet or deeper below the surface. Rooms 20 to 30 wide are cut into the coal bed leaving a series of 100-foot-wide pillars, or columns of coal, to help support the mine roof. As mining advances, a grid-like pattern of rooms and pillars is formed.

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