Rock Crushing Analysis of TBM Disc Cutter Assisted by Ultra-High-Frequency Loading

Table 1

Mechanical parameters of rock-forming minerals.

Rock-forming minerals	Quartz	Mica	Plagioclase	Alkali feldspar
Elastic modulus (GPa)	90	40	81	67
Poisson’s ratio	0.3	0.28	0.28	0.27
Tensile strength (MPa)	100	60	90	90
Cohesion (MPa)	55	30	45	45
Friction angle (°)	60	30	50	50
Crystal size (mm)	0.5–2.5	0.5–2.0	0.6–3.0	0.6–3.0
Proportion	30.50%	7.00%	45.30%	17.20%