This crossword clue is for the definition: Raise.
it’s A 5 letters crossword puzzle definition.
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Possible Answers: REAR.
Last seen on: LA Times Crossword 18 Feb 2018, Sunday
Random information on the term “Raise”:
A 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 (typically a concrete pad). A small-diameter hole (pilot hole) is drilled to the level required; the diameter of this hole is typically 230mm – 445mm (9″ – 17.5″), large enough to accommodate the drill string. Once the drill has broken into the opening on the target level, the bit is removed and a reamer head, of the required diameter of the excavation, is attached to the drill string and raised back towards the machine. The drill cuttings from the reamer head fall to the floor of the lower level. The finished raise has smooth walls and may not require rock bolting or other forms of ground support. The one of impressive use of raise boring is a 7.1 m diameter shafts for Sasol’s Middelbult and Bosjesspruit Mines in South Africa.