Research on Rock Burst Control Mechanism of Deep Buried Tunnel Using Surrounding Rock Modification Theory

Table 2

Rock mechanical parameters.

Material density (kg·m^−3)	Modulus of elasticity (Pa)	Poisson’s ratio	Cohesion (Pa)	Tensile strength (Pa)	Internal friction angle (°)	Dilatancy angle (°)
2550	4.9e10	0.25	2.3e7	1.18e7	54.8	13