Model Test Study on the Antibreaking Technology of Reducing Dislocation Layer for Subway Interval Tunnel of the Stick-Slip Fracture

Table 4

Basic mechanical parameters of similar materials in surrounding rock.

Parameter	Modulus of elasticity (MPa)	Bulk density (kN·m^−3)	Cohesive (kPa)	Internal friction angle (°)
Archetypal surrounding rock	1300∼6000	17∼20	20∼200	20∼27
Tunnel rock similar material	29.6	12.6	3.3	24.5