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The Room and Pillar method is adopted in mining. The mica obtained from the mine is called crude mica. ... The Room and Pillar method is used in the mining of mica.
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Room and pillar is a method employed in underground mining in which rooms are cut into the coal bed and pillars of ore are left to provide support.
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Primary Mineral: Mica, Beryllium. Lat, Long: 46.8897, -116.57830. ... Mining Method: Open Stope - Room and Pillar Milling Method: Handsort Year First Production: 1888
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