'deep-mined' definitions:

Definition of 'deep-mined'

(from WordNet)
adjective
Of coal, as contrasted with coal obtained from a strip mine; "deep-mined coal"

Definition of 'deep-mined'

From: GCIDE
  • mined \mined\ adj. extracted from a source of supply as of minerals from the earth. [Narrower terms: deep-mined; exploited; strip-mined] [WordNet 1.5]

Definition of 'deep-mined'

From: GCIDE
  • deep-mined \deep-mined\ adj. taken from an undergrround mine; -- as contrasted with coal obtained from a strip mine; as, deep-mined coal. [WordNet 1.5]