room-and-pillar









room-and-pillar


room-and-pillar [room-uh n-pil-er, roo m-] adjective Mining.

  1. noting a means of extracting coal or other minerals from underground deposits by first cutting out rooms, then robbing the pillars between them; pillar-and-breast.

Compare longwall.

Leave a Reply

Your email address will not be published.

49 queries 0.437