What is the purpose of an ore pass?

Solution (By Examveda Team)

Ore pass: An ore pass is a vertical or inclined chute used in underground mining operations to transport extracted ore from one level of the mine to another.

Correct Answer: Option C: Ore transfer between levels

The primary purpose of an ore pass is to facilitate the efficient and safe movement of broken ore from upper mining levels to lower levels, where it can be collected and transported to the surface for processing. Ore passes are typically constructed of concrete or steel and are designed to withstand the abrasive nature of the ore and the substantial forces involved in transporting large volumes of material. They often incorporate features such as chutes, gates, and loading points to control the flow of ore.

Why other options are incorrect:

Option A: Water drainage: While some ore passes might incidentally help drain water, this is not their primary function. Water drainage in mines is usually handled by dedicated systems, such as sumps and pumps.

Option B: Waste storage: Waste rock (or tailings) is usually disposed of in designated areas, separate from ore passes. Storing waste in ore passes would hinder their primary function and potentially cause blockages.

Option D: Air circulation: Mine ventilation is managed through separate ventilation shafts and systems. Ore passes are not designed for air circulation and could even obstruct airflow if improperly managed.