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Contributors: Amethyst Mine Panorama- Year: 1976
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- Thunder Bay Amethyst Mine
Shown in this photo is open pit benching. Benching of a steep work face consists of narrow horizontal steps across the slope. The rock is exposed and then inspected. Open pit benching is used where slopes are sufficiently steep, water supply is available, and there is room for the dump … Shown in this photo is open pit benching. Benching of a steep work face consists of narrow horizontal steps across the slope. The rock is exposed and then inspected. Open …Amethyst Mine Panorama
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