Screening the Main Factors Affecting the Wear of the Scraper Conveyor Chute Using the Plackett–Burman Method

Table 5

Parameters of PBD test.

Symbol	Parameters	Low level (−1)	High level (+1)
A	Water content in the coal (%)	0	15
B	Gangue content in the coal (%)	0	25
C	HGI of coal	51	75
D	Coal particle size (mm)	1(0.5~2)	7(6~8)
E	Normal load (N)	10	35
F	Scraper chain speed (m/s)	0.4	0.9