Engineering Considerations
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Room and pillar mining is commonly done in flat or gently dipping
bedded ores. Pillars are left in place in a regular pattern while the rooms are mined out.
In many room and pillar mines, the pillars are taken out, starting at the farthest point
from the mine haulage exit, retreating, and letting the roof come down upon the floor.
Room and pillar methods are well adapted to mechanization, and are used in deposits such
as coal, potash, phosphate, salt, oil, shale, and bedded uranium ores. |
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