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room and pillar mining of limestone

room and pillar mining of limestone

Room and pillar. Room and pillar is also known as bord and pillar is amining system in which the mined material is taken out across a horizontal plane while leaving "pillars" of unscathed material to support the overstrain leaving open regions or "rooms" underground. It is normally utilized for fairly flat-lying deposits, like those that follow a meticulous stratum.

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