Research on Stability of an Open-Pit Mine Dump with Fiber Optic Monitoring

Table 2

Key deformation parameters of granular waste rock.

Lithology	Parameter
	Initial void ratio (n)	n	Compression modulus (MPa)	Poisson’s ratio
Upper dumping materials of the dump	0.6	37.4%	26.05	0.37
Middle dumping materials of the dump	0.57	36.4%	26.4	0.35