Winze: the shaft that goes the wrong way

Outside the mine, a shaft is any long, narrow passage or rod. It might be vertical, like a mine shaft or lift shaft, or horizontal, like a drive shaft in a car. The word carries a general sense of depth and straightness.

In mining, a winze is something more specific: a steep passage driven between two working levels that already exist. It is not a main vertical shaft sunk from the surface. Instead, miners drive it upward or downward to connect a lower level with one above it, or to prepare a path toward ore that lies deeper still. Because the winze links existing levels, it allows miners to move between them without returning to the surface. It also opens the ore body to forced ventilation, pushing fresh air into lower workings where poisonous gases collect.

The winze differs from a raise in angle and function. A raise is also driven between levels, but miners drive it upward and tend to use it for ventilation and movement between shallow levels. A winze slopes more steeply and often pushes deeper, exploring whether ore reserves justify the expense of opening a new level.

The word probably comes from the Swiss-German wintze, a steep or winding passage. It entered English mining vocabulary in the 18th and 19th centuries as the mineral industry expanded and standardized its methods. The Swiss Alps held rich ore deposits, and Swiss mining knowledge shaped English practice. The term stuck because it named something English miners needed to do: drive diagonal shafts through solid rock to probe the depths without committing to a full new level.