Determination of the Ultimate Underground Mining Depth considering the Effect of Granular Rock and the Range of Surface Caving

Table 3

The parameters of rock mass in the southeast mining area.

Material	(g·cm^−3)	(MPa)	(MPa)	(°)	c (MPa)	Em (GPa)
Hanging wall	2.7	5.99	1.07	35	0.34	8.82	0.31
Foot wall	2.7	8.51	1.71	52	0.67	17.31	0.27
Ore body	3.7	10.83	2.21	53	0.85	23.1	0.21
Granular rock	2.0	0.05	0.01	18	0.01	0.2	0.4