Stiffness Determination of Backfill-Rock Interface to Numerically Investigate Backfill Stress Distributions in Mine Stopes

Table 1

A summarize of fixed parameters in all numerical models.

Items	Unit weight (kN/m^3)	Young’s modulus (Pa)	Poisson’s ratio	Cohesion (Pa)	Internal friction angle (°)	Dilation angle (°)
Rock mass	27	3 × 10^10	0.25	—	—	—
Backfill	18	3 × 10^8	0.3	0	35	0
Interface	—	—	—	0	21	—