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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 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. One impressive use of raise boring is the seven meter diameter shafts for Sasol’s Middelbult and Bosjesspruit Mines in South Africa.
The boxhole borer (or machine roger) is a variant of a raise borer that is used when there is not enough space on the higher of the two levels to be connected.
The boxhole borer is set up on the lower level, drills a pilot hole as a guide, then drives the reamer bit along the pilot hole from the lower level to the upper. Precautions have to be taken to redirect falling drill cuttings away from the machine, and to reinforce the drill string.
The Global Raise Boring Machine Market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
TERRATEC to debut TRC3000C Raise Boring Machine in India – TERRATEC has successfully completed the factory acceptance testing of a custom TR3000C Raise Boring Machine (RBM) at its workshop in Tasmania, Australia, with the machine destined for a customer in India.After extensive research and analysis, TERRATEC was chosen to supply this first large raiseborer to India
Manufactured at TERRATEC’s workshop in Tasmania, the TR3000C Raise Boring Machine is a highly robust piece of equipment, designed for ease of operation and maintenance, providing a high level of reliability, according to the company.
The unit has a nominal boring size of 3 m in diameter and 400 m in depth and has a standard pilot hole diameter of 311 mm.The machine has been designed in a modular form that makes disassembly of the major components for inspection, transport, or repair easy to achieve, the company claimed.
