mine vs surface mine

mine is a noun but surface mine is not a noun.

Word	Noun	Adjective	Verb	Adverb
mine	Yes	No	Yes	No
surface mine	No	No	Yes	No

As verbs, surface mine is a hyponym of mine; that is, surface mine is a word with a more specific, narrower meaning than mine:

Other hyponyms of mine include strip mine, surface-mine.

mine (noun)	surface mine (noun)
explosive device that explodes on contact; designed to destroy vehicles or ships or to kill or maim personnel
excavation in the earth from which ores and minerals are extracted

mine (verb)	surface mine (verb)
lay mines	extract (ore) from a strip-mine
get from the earth by excavation