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

Table 2

Model micromechanical parameters.

Contact model		Parameters	Quartz	Mica	Plagioclase	Alkali feldspar
Linear model		Effective modulus (GPa)	10	10	10	10
		Normal-to-shear stiffness ratio	0	0	0	0
		Normal critical damping ratio	0.5	0.5	0.5	0.5
Linear parallel bond model	Linear group	Effective modulus (GPa)	60	20	40	35
		Normal-to-shear stiffness ratio	2.5	2.5	2.5	2.5
		Friction coefficient	0.6	0.6	0.6	0.6
	Parallel-bond group	Bond effective modulus (GPa)	60	20	40	35
		Bond normal-to-shear stiffness ratio	2.5	2.5	2.5	2.5
		Tensile strength (MPa)	500	300	400	400
		Cohesion (kN)	1000	600	800	800
		Friction angle ()	35	25	30	30
Smooth joint model		Normal stiffness (GPa)	0.6 ×	0.6 ×	0.6 ×	0.6 ×
		Shear stiffness (GPa)	0.6 ×	0.6 ×	0.6 ×	0.6 ×
		Tensile strength (MPa)	12	12	12	12
		Cohesion (kN)	120	120	120	120
		Joint friction angle (°)	30	30	30	30