An emergency escape raise.

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[1]

Raises serve a number of 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[2]

References

  1. ↑ Puhakka, Tulla (1997). Underground Drilling and Loading Handbook. Finland: Tamrock Corporation. p. 180.
  2. ↑ Puhakka, Tulla (1997). Underground Drilling and Loading Handbook. Finland: Tamrock Corporation. pp. 181–185.
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