In mine development, what is the primary function of a crosscut?

Solution (By Examveda Team)

Crosscut Definition:
A crosscut, in the context of mine development, is a horizontal or nearly horizontal passageway driven from one mine workings to another, typically at right angles (or "crosses") to the main haulage ways or other drifts. It's not just any tunnel; it serves a specific purpose within the mine layout.

Correct Answer: Option D: Connect drifts
The primary function of a crosscut is to connect two or more separate drifts (or other mine workings). Drifts are essentially tunnels that follow a specific geological structure, like an ore body or a specific rock layer. Crosscuts are strategically placed to establish connections between these drifts, enabling various crucial operations. This connectivity is fundamental for multiple reasons, including:
• Improved access: Connecting drifts allows easier and faster access to different parts of the mine, improving transportation of materials and personnel.
• Enhanced ventilation: Crosscuts play a critical role in mine ventilation by providing alternate pathways for airflow, helping to dilute harmful gases and provide fresh air to various sections.
• Support for other operations: Crosscuts can facilitate other operations, such as access for exploration or development of new sections, improved access for ground control measures, or providing multiple escape routes.

Why other options are incorrect:
Option A: Access ore body: While a crosscut *might* intersect an ore body, its primary purpose is not to directly access the ore. Access to the ore is usually achieved via drifts or other specific development workings designed to follow the ore's geological configuration. Crosscuts aid in access indirectly by connecting these ore-accessing drifts.
Option B: Drain water: Water drainage in mines is typically handled by dedicated systems like sumps, pumps, and drainage galleries. Although a crosscut *could* incidentally aid in water drainage by providing an additional pathway, it is not its primary function.
Option C: Provide ventilation: While crosscuts contribute to ventilation, as mentioned above, their main purpose is not solely to provide ventilation. Ventilation is usually a more complex system involving shafts, fans and dedicated ventilation pathways, which crosscuts support, but don't replace.