pillaring
 n.— «Caylor said he believes retreat mining, also known as pillaring, or secondary mining, is important because it allows companies to get more coal than they otherwise would.» —“Deadly coal mining method comes under scrutiny” by Roger Alford in Cumberland, Ky. St. Louis Post-Dispatch (Mo.) Sept. 5, 2005. (source: Double-Tongued Dictionary)

Tagged with →