WV-PPP: All Republicans ahead of Obama

[opebo]

... the coal industry ... now - as in most other places - is dominated by small drift mines (yeah, that's not the American term, but you know what I mean) and various forms of opencast mining.

Does 'various forms of opencast mining' include the very large mines that are, by my very inattentive understanding, the source of much of the coal produced in developed countries, from places like Wyoming and Australia?