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Room and Pillar For relatively flat ore deposits with little change in elevation throughout miners drill an access ramp to the deposit and remove ore in a pattern of holes rooms and roof supports pillars The rooms can be mined out using conventional charge and blast techniques or more commonly now with a machine called a

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2 Room Bord and Pillar mining or continuous mining method It is the most common supported pillar method designed and used primarily for mining flat lying seams or tabular orebodies or gently dipping bedded ore deposits of limited thickness like coal oil shale limestone phosphate salt trona potash and bedded uranium ores Room

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Room and pillar mining is a nonsubsidence plan for a mine preserving the precious farmland is among the safest and one of the most ecologicallyfriendly approaches to mining coal today creating a nonsubsidence environment no movement of land and maintaining clean water standards

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Longwall Mining Longwall underground mining is a the use of a continuous mining machine with entries during room and pillar mining as well

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As in the room and pillar method longwall mining starts with sets of entries cut into the panel The longwall machine laterally shears or plows coal from the

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There are two main methods of underground mining room and pillar and longwall mining Room and pillar mining In room and pillar mining coal deposits are mined by cutting a network of rooms into the coal seam and leaving behind pillars of coal to support the roof of the mine

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There are two main methods of underground mining room and pillar and longwall mining Room and pillar mining In room and pillar mining coal deposits are mined by cutting a network of rooms into the coal seam and leaving behind pillars of coal to support the roof of the mine

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