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Cs in mpa required machine weight 1 400 roadheader in

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Unformatted text preview: u k wi tta the bil ity xcel le 40 20 0 20 40 60 80 100 120 140 160 Limiting rock strength (U.C.S. in MPa) Required machine weight (1) 400 Roadheader in compact design 300 Roadheader with extended cutting range 200 Continuous operation Admissible cutterhead power (kW) 100 Short term peaks (a) Machine weight (t) 180 140 100 60 20 0 50 100 150 200 250 300 350 400 450 Cutter motor (kW) (b) Cutter loaders Roadheaders with standard cutting range Roadheaders with extended cutting range Figure 10.5 (a): Indicative diagram for roadheader’s selection. Inter-relationship of weight of machine, its power (kW), rock strength and operating environment. (b): Relation between weight and power (kW) of roadheaders. A useful guide for roadheader selection. © 2005 by Taylor & Francis Group, LLC 244 SURFACE AND UNDERGROUND EXCAVATIONS 10.5 ADVANTAGES OF ROADHEADERS3,4,5 Versatility and Mobility : TBM generates circular openings whereas this unit can generate variety of sections. Face can be accessed, and by retraction a roadheader from the face; all required measures for rock protection (support) can be performed without significant sh...
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