Rib Spalling 3D Model for Soft Coal Seam Faces with Large Mining Height in Protective Seam Mining: Theoretical and Numerical Analyses

Table 2

Material properties of a triangular prism for the numerical model.

Parameter	Value
Homogeneity index	5
Average elastic modulus/GPa	2.43
Poisson’s ratio	0.31
Mean of uniaxial compressive strength/MPa	4.2
Compressive-to-tensile strength ratio	12
Residual coefficient	0.2