Calibration of Contact Parameters for Moist Bulk of Shotcrete Based on EDEM

Table 1

Parameters of Plackett–Burman test.

Symbol	Parameters	Parameter levels
		−1	+1
T1	P-P^1 restitution coefficient	0.4	0.8
T2	P-P static friction coefficient	0.01	1
T3	P-P rolling friction coefficient	0.01	0.1
T4	P-S^2 restitution coefficient	0.4	0.8
T5	P-S static friction coefficient	0.5	1
T6	P-S rolling friction coefficient	0.05	0.2
T7	Surface energy	0.01	0.5
T8, T9, T10 and T11	Virtual parameters	−1	+1

Note. 1: particle-particle; 2: particle-steel.