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:

  1. Conventional or open raise
  2. Long-hole or drop raise
  3. Alimak
  4. Raise boring

Raises serve a number or purposes including:

  1. Transportation of ore and waste rock
  2. Ventilation
  3. Creating a free face for mining
  4. Movement of workers via manway ladders

Famous quotes containing the word raise:

    But from this earth, this grave, this dust,
    My God shall raise me up, I trust.
    Sir Walter Raleigh (1552?–1618)