Line MiningLINE MINING Calcite and dolomite, when heated and in some cases slurried or combined with salt, are used in making many everyday products such as.learn about line mines,How is line mined? | ReferenceLine is surface mined through open pit quarries or hillside cuts, or horizontally by tunneling under the overlaying surface rock. . Most underground mining uses the room-and-pillar method, in which the . Learn more about Earth Science.
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