A Large Goaf Group Treatment by means of Mine Backfill Technology

Table 2

Rock mass mechanical variables.

Variables	Slate	Ore
Uniaxial compressive strength (MPa)	9.38	7.65
Uniaxial tensile strength (MPa)	0.61	0.68
Apparent cohesion (MPa)	2.28	2.11
Angle of friction (°)	34.87	32.74
Young’s modulus (GPa)	13.65	10.95
Specific gravity	2.58	3.67
Poisson’s ratio	0.31	0.18