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日本本州岛奈原矿系开采一块状黄铁矿矿体,已有25年开采历史。矿体长500米、宽500米、中央厚60米,埋藏深度平均为370米,矿体北部倾角
Japan’s Honshu Island, the original mining unit of a piece of pyrite ore body, mining history of 25 years. The orebody is 500 meters long, 500 meters wide and 60 meters thick in the center. The depth of burial is an average of 370 meters. The dip of ore body in the north