Similarity Model Test on the Spatiotemporal Evolution Law of Deformation and Failure of Surrounding Rock-Induced Caving in Multi-Mined-Out Areas

Table 1

The mechanical parameters of rock mass in Paishanlou Gold Mine.

Type of rock body	Ore	Surrounding rocks in the upper wall	Bed rocks of the footwall
Compressive strength (MPa)	22.1	25.19	27.4
Strength of extension (MPa)	1.85	2.5	2.54
Elasticity modulus (GPa)	34	43.1	42.17
Cohesion (MPa)	5.63	6.53	7.03
Internal friction angle (°)	36	35.1	35.7