Rock Tunnels
Task / DescriptionSlow Ave Fast Units Excavation, non explosive chemical method, cycle time8.0 6.0 5.5 mins Excavation, non explosive chemical method, Class I Granite0.3 0.9 1.2 m3/cycle Excavation, non explosive chemical method, Class II Granite2.0 2.6 2.9 m3/cycle Excavation, non explosive chemical method, Class III Granite1.2 1.4 1.8 m3/cycle