1000214514-1000302097

Cody Grismer of Thyssen Mining Construction of Canada is working on the fresh air intake for Zone 97, using an Ingersoll Rand RBM7 raise boring machine. The 3.0-m-diameter raise is being drilled upward from 536-m-depth to surface, and will later be reamed to 3.7-m diameter from level 6 upward. Thyssen has about 10 drillers on the raise bore crew.

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