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Lady Loretta mine
Australia, Mount Isa
2005 – 2014
Record performance in Australian mines

The Herrenknecht Boxhole Boring Machine (BBM) is an example of how the technology transfer from tunnel construction to mining operations can take place. The BBM is based on the proven pipe jacking method and is used to drill vertical and inclined raises or shafts with diameters of up to 1.5 meters.

The latest top performer in Australia is a second generation BBM 1100 in Glencore Xstrata’s Lady Loretta mine with a contract of over 500 meters and 26 slot holes. At up to 3 meters per hour and up to 16 meters per shift, within just 4 weeks 11 slot holes were created with total output of over 200 meters.

Three BBMs from Herrenknecht have successfully completed upwards of more than 130 upward holes with a total output of more than 2,500 meters at different underground mines in Australia. The drilling diameter is 1.1 meters at maximum drilling lengths of up to 30 meters.

The remote-controlled BBM technology convinced our customers with high occupational health and safety, high mobility and a large spectrum of application ranges, such as ventilation shafts and slot holes for draw points (ore extraction points).

Data Sheet

Country, Location

Australia, Mount Isa

Year

2005 – 2014

Application

Opening holes in production level

Geology

Rock > 120 MPa

Tunnelling length

30 m

Machine Data

1x Boxhole Boring Machine:
Diameter: 1,100 mm</ br>

Your contact person Contact us

Jack Brockway President and CEO Herrenknecht Tunnelling Systems USA Inc.
Gerhard Goisser COO Herrenknecht Tunnelling Systems USA, Inc.