Artificial intelligent assistant

shaftsman

shaftsman Mining.
  (ˈʃɑːftsmən, -æ-)
  [f. shaft n.3 + man n.1 after craftsman, etc. Cf. shaftman, shaft n.3 4 b.]
  A man employed in sinking shafts.

1881 Instr. Census Clerks (1885) 84 Coal Miner..Shaftsman. 1892 Pall Mall Gaz. 21 Mar. 7/3 Walking from eight to ten miles a day before and after his underground work (much of it as a shaftsman).

Oxford English Dictionary

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