Study on the Generation Mechanism and Development Law of the Zonal Disintegration in Deep Burial Tunnels

Table 2

Physical and mechanical parameters for simulation.

Lithology	Weight (kN/m^3)	Elastic modulus (GPa)	Cohesion (MPa)	Internal friction angle (°)	Tensile strength (MPa)	Compressive strength (MPa)	Poisson ratio
Medium sandstone	26.2	12.97	10∼15	40∼43	14.01	88.55	0.268