VDMA

Germany 2019

Best of Germany 2014 - Mining Equipment and Mining Technology

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VDMA 32 VDMA MINING SUPPLEMENT • 2019 trolled system with the newly developed pipe feeder ensures both efficient workflows as well as significantly greater work safety for the personnel during installation and removal of the drill string. Australian mining contractor Mcmahon reported, "the design of the new raise drill has eliminated most of the manual lifting, pushing and maneuvering efforts required by operators. This is a major step forward that will not only boost safety, but also increase productivity." The machine is designed for long raises up to 2,000 m and large reaming diameters for ventilation and haulage shafts. The robust and powerful rig with its highly efficient variable-fre- quency drive ensures reliable operation in various conditions. Where mechanized shaft-sinking methods cannot be used, the Shaft-drilling Jumbo is an option. In this procedure, blast patterns with two to five rigs can be created — either for blind shafts or shaft enlargement. The shaft is extended with each blast and the jumbo is repositioned. The 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 shafts with diameters of up to 1.5 m. The latest top performer in Australia is a second-generation BBM 1100 in Glencore Xstrata's Lady Loretta mine with a contract of more than 500 m and 26 slot holes. At up to 3 m/h and up to 16 m/shift, within just four weeks, 11 slot holes were created with total output of more than 200 m. Three BBMs from Herrenknecht have successfully completed upward of 130 holes with a total output of more than 2,500 meters at different underground mines in Austra- lia. The drilling diameter is 1.1 m at maximum drilling lengths of up to 30 m. The remote-controlled BBM technology convinced our cus- tomers 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). In 2013, Herrenknecht supplied two BBM1500 for the drilling of ventilation shafts in the world's largest underground copper mine, El Teniente in the Chilean Andes at 2,000 m above sea level. The BBM1500 is a further development of the BBM1100 with a larger drilling diameter (1.5 m) and greater torque (115 kNm). The BBM1500 is equipped with a navigation system in order to ensure ac- curate positioning of the hole. If necessary, the alignment of the boring unit in the borehole can be altered by means of hydraulic cylinders. Under the direction and with support of the systems by service technicians from the Chile Herrenknecht subsidiary and two Chilean drilling companies, the two Boxhole Boring Machines have completed more than 30 slot holes and shafts with a total output of more than 1,200 m in the first 12 months. The maximum distance excavated was 60 m. Best performances of up to 2.7 m/hr and 17 m/d were achieved. A second-generation Herrenknecht BBM 1100 creates slot holes at Glencore Xstrata's Lady Loretta mine in Australia. Know-How Performance Reliability Phone +49 6897 857-0 Fax +49 6897 857-188 Becker Mining Systems AG Walter-Becker-Straße 1 66299 Friedrichsthal Germany info@becker-mining.com www.becker-mining.com

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