Table 3 Plackett–Burman experiment parameter list.

From: Research on coal rock parameter calibration based on discrete element method

Number

Parameters

low-level(− 1)

high-level(1)

ID1

Recovery coefficient between coal and coal particles

0.2

0.8

ID 2

Static friction coefficient between coal and coal particles

0.1

0.8

ID 3

Rolling friction coefficient between coal and coal particles

0.01

0.12

ID 4

Recovery coefficient between coal particles and steel

0.3

0.7

ID 5

Static friction coefficient between coal particles and steel

0.4

0.8

ID 6

Rolling friction coefficient between coal particles and steel

0.01

0.15

ID 7, ID 8, ID 9, ID 10, ID 11

Virtual parameters