Which term describes the horizontal tunnel through a diamond-bearing pipe?

Which term describes the horizontal tunnel through a diamond-bearing pipe?

• A. Cave Mining
• B. Ore Grade
• C. Microdiamond Testing
• D. Drift

Answer: (D)

Accessing an underground diamond-bearing pipe with a horizontal passage is described by the term drift. In underground mining, a drift is a horizontal tunnel driven into the side of the ore body (such as a kimberlite pipe) to reach and extract ore, allowing equipment and workers to advance along the ore body and connect with other workings. This contrasts with cave mining, which relies on creating voids through rock breakage and collapse and is not defined by a horizontal tunnel. Ore grade and microdiamond testing refer to ore quality and diamond evaluation, not to the shape or orientation of mine openings.

Accessing an underground diamond-bearing pipe with a horizontal passage is described by the term drift. In underground mining, a drift is a horizontal tunnel driven into the side of the ore body (such as a kimberlite pipe) to reach and extract ore, allowing equipment and workers to advance along the ore body and connect with other workings. This contrasts with cave mining, which relies on creating voids through rock breakage and collapse and is not defined by a horizontal tunnel. Ore grade and microdiamond testing refer to ore quality and diamond evaluation, not to the shape or orientation of mine openings.