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

Table 4

The values of the engineering parameter in the southeast mining area.

Parameter	(°)	(°)	(°)	(°)	(°)	(kN/m³)	(kN/m³)	H0 (m)	Hc (m)
Value	15	0	70	23	70	27	20	40	32