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classification of iron ore crusher quarry mining

Garnetminingtechniques can be divided into two common excavation types: surfaceminingand undergroundmining. Surfaceminingis done by removing surface vegetation, dirt, and if necessary, layers of bedrock in order to reach buriedoredeposits. Sub-surfaceminingconsists of digging tunnels or shafts into the earth to reach buriedoredeposits.

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