Siteadmin, Check users, Administrators
6,631
edits
Changes
Jump to navigation
Jump to search
Line 1:
Line 1: − + +
no edit summary
shortwall mining
A shortwall mining system consists of a room-and-pillar mining system in which the working face is wider than usual but smaller (less than 150 feet) than that in longwall mining.
[[category:energy]]
[[category:energy]]
[[Category:Seeds to be nurtured]]