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10 for most tunneling applications electrical cutter

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Unformatted text preview: nels, stations and caverns of great height can be driven in one single pass. Cutter booms are available with hydraulic drives and with electric motors upto 450 kW (600 hp).10 For most tunneling applications, electrical cutter head drives of 75 to 123 kW (100 to 165 hp) proved to be practical. For the excavation of stations, halls and wide tunnels, electrical cutter motors in the range of 123 to 160 kW (165 to 215 hp) © 2005 by Taylor & Francis Group, LLC TUNNELING BY ROADHEADERS AND IMPACT HAMMERS 251 Excavation with short advanced roof section using Roadheader (AMT70) Figure 10.11 Application of roadheader AMT 70 with NATM. are recommended. In addition to the cutter boom attachment, the excavator is also equipped with a loading apron and an under-slung conveyor. When comparison made between Cutter Boom with Roadheaders; the following features found to be in favor of these excavator mounted cutter booms:10 ● ● ● ● ● In soft rock up to approximately 62 MPa (9,000 psi) unconfined compressive strength (UCS), an exca...
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