PFC2D-Based Analysis of the Effect of the Axial Loading Rate on the Mechanical Properties of Backfill

Table 4

Weibull distribution parameters.

Loading rate (mm/s)	Initial modulus (GPa)	Peak stress (MPa)	Peak strain (%)	m	/
0.1	1.50799	3.345	0.2269	44.150	2.472
1	1.50849	3.349	0.2271	44.1158	2.47455
10	1.51023	3.470	0.2366	34.120	2.624
50	1.52533	3.856	0.2834	8.751	3.631
100	1.51587	4.275	0.3032	13.807	3.667