open-pit
adjective/ˌəʊpən ˈpɪt/
/ˌəʊpən ˈpɪt/
(North American English) (British English opencast)
[usually before noun]- in open-pit mines coal is taken directly out of the ground near the surface, without digging tunnels
see also strip mining露天开采的 Oxford Collocations DictionaryOpen-pit is used with these nouns:- mine