9781439834220.ch10

The details are shown in table 1015 figure 105a5 also

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Unformatted text preview: could cope up with rocks of compressive strength in the range of 20–140 MPa. The details are shown in table 10.1.5 Figure 10.5(a)5 also is a useful guide to select a Table 10.1 Classification of roadheaders.5 RH – Roadheader. RH with standard cutting range Roadheader Weight range (t) Cutter head power (kW) Light Medium Heavy Extra heavy 8–40 40–70 70–110 100 50–170 160–230 250–300 350–400 © 2005 by Taylor & Francis Group, LLC RH with extended cutting range Max. Section (m2) Max. Section (m2) Max. UCS (MPa) 40 60 70 80 20–40 40–60 50–70 80–110 25 30 40 45 Max. UCS (MPa) 60–80 80–100 100–120 120–140 TUNNELING BY ROADHEADERS AND IMPACT HAMMERS 243 roadheader based on uniaxial compressive strength, tunnel’s cross section, required weight and power of the machine. Figure 10.5(b)5 illustrates roadheaders with different features and their corresponding weight and power (kW). Tamrock-Sandvik also advocates that roadheaders’ range of applications has been extended into harder formations. Min. cross section (sq.m) 40 or it f lim k oc lt r ns itio nd co ficu 20 dif or e ag er av or it f 30 ble tta Cu it f Lim Lim 160 140 120 100 80 nt 60 10 roc c...
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