A Shaft in mining is best described as which of the following?

• A. A surface pit used for ore storage.
• B. A vertical tunnel drilled in stable rock near the pipe to provide access for personnel, equipment, supplies, and ventilation.
• C. A horizontal tunnel used for drainage.
• D. A type of drill used for sampling.

Answer: (B)

A shaft in mining is a vertical or near-vertical opening sunk into stable rock to reach underground ore bodies and to move people, equipment, and supplies to and from the workings. It also provides a pathway for ventilation and often hoisting of ore and waste. This matches the description of a vertical tunnel drilled in stable rock near the ore body to provide access for personnel, equipment, supplies, and ventilation.

The other ideas describe different features: a surface pit is on the surface and used for ore storage, a horizontal tunnel is a drift/adit used for drainage, and a drill used for sampling is a tool rather than an access opening.