Raise (mining)
# 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
* Alimak
* 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
