A Geomechanical Model Test on the Construction Stability and Overload Failure Process of an X-Type Cross Cavern Group

Table 1

Mechanical and physical parameters.

Category	Unit weight (kN/m^3)	Deformation modulus (GPa)	Uniaxial compressive strength (MPa)	Tensile strength (MPa)	Cohesion (MPa)	Friction angle (°)	Poisson’s ratio
Original rock	26.80	49.17	132.37	6.86	28.13	50.6	0.264
Theoretical value of analogue material	26.80	0.983	2.647	0.134	0.563	50.6	0.264
Measured value of analogue material	26.2–27.1	0.955–0.992	2.611–2.683	0.123–0.142	0.541–0.571	49.9–50.6	0.25–0.27