Rates, Norms & Durations / Tunnelling & Mining
Chemical Excavation Methods
Rock TunnelsTask / 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
Subjects on this page
| Activity | Entry (verbatim) | Value | Source |
|---|---|---|---|
| Cone Fracture Rock Breakage | Penetrating Cone Fracture Rock Breakage. Tradename of "SunBurst" from Australia. State of the art, non-explosive chemical rock breakage technology for close proximity excavation applications in mining and civil engineering. Explosive system, cycle time of 6 mins, giving 0.33 m3 each explosion. A typical rate of 10 No cycles per hour, giving 3.3 m3/hr/rig. However, tests have shown differing results... Fresh granite of class 1 strength - One hole in the floor, yielding 0.15 m3 of rock. If more holes had been injected, a yield of 0.5 - 1.0 m3 would be expected. Moderately fresh igneous rock of class 2 strength - Three holes in a sloping trench, in adjacent locations, yielding 2.6 m3 of rock for each hole. Moderately weathered volcanic rock of class 3 strength - Two holes in the floor, in separate locations, yielding 1.2 - 1.5 m3 of rock for each hole. | 3.3 m3 per hrper hrParsed | Cone Fracture Rock Breakage |
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These values were contributed by members and reflect the conditions, methods and regions they worked in. They are a starting point for estimating, not a standard. Check them against your own records, the site conditions and the contract before relying on them.