Raise (mining)
In underground mining, a raise refers to a vertical or inclined excavation that leads from one level, or drift, to another. A raise may also extend to surface. There are four excavation methods for raises:
- Conventional or open raise
- Long-hole or drop raise
#
- Raise boring
Raises serve a number of purposes including:
- Transportation of ore and waste rock
- Ventilation
- Creating a free face for mining
- Movement of workers via manway ladders
