Raise (mining)

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 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[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.
This article is issued from Wikipedia - version of the 4/11/2013. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.