Raise (mining)
Encyclopedia
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:
Raises serve a number or purposes including:
- Conventional or open raise
- Long-hole or drop raise
- Alimak
- Raise boringRaise borerA raise borer is a machine used in underground mining, to excavate a circular hole between two levels of a mine without the use of explosives.The raise borer is set up on the upper level of the two levels to be connected, on an evenly laid platform...
Raises serve a number or purposes including:
- Transportation of oreOreAn ore is a type of rock that contains minerals with important elements including metals. The ores are extracted through mining; these are then refined to extract the valuable element....
and waste rock - Ventilation
- Creating a free face for mining
- Movement of workers via manway ladders