The Delft Sand, Clay & Rock Cutting Model, 2019a

Rock Cutting: Hyperbaric Conditions.
1000000
Rock Cutting
100000
10000
Esp in kPa
Ductile
Brittle
1000
100
10
1000 10000 100000
Compressive strength in kPa
R=2, 0 bar R=4 R=8 R=16 R=32 R=64 R=2, 10 bar
R=2, 100 bar R=2, 200 bar R=2, 300 bar R=2, 400 bar R=2, 500 bar R=1000 bar
The specific energy Esp as a function of the compressive strength of rock,
for different ratio's between the compressive strength and the tensile strength.
For a 60 degree blade.
Figure 9-31: The specific energy Esp in rock versus the compressive strength (UCS) for a 60º blade.
Blade angle α = 60º, layer thickness hi = 0.05 m, blade height hb = 0.1 m, angle of internal friction φ = 20.00º,
angle of external friction δ = 13.33º, shear angle β = 40.00º.
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