Same as the previous image, perhaps Ahmeek #3 & 4
The lower image is identified as Ahmeek, 23rd level. Looks like a pump, but no ID for the workman.
Thanks to Joseph Enrietti of Ahmeek for being able to identify the first photo. He says the tall one is Edward Peterman and the other Simon Hawking and that this is the Ahmeek 3&4 mine.
The man in the center is still unknown.