Selection of an Appropriate Mechanized Mining Technical Process for Thin Coal Seam Mining

Table 8

Priorities of the alternatives considering economical main criterion.

	2 = 20~40 m)	3 = 40~60 m)	4 = 60~80 m)	5~6; ( = 80~120 m)	7~10; ( = 120~200 m)	11~15; ( = 200~300 m)
Priorities	, , /,	, /, ,	//, ,	/, , ,	/, , ,	/, , ,

Notes: / shows that the priority of alternative is the same as the one of .