Possible Clues:

• Deposit remover?
• Canary holder, at times
• Little fella heard behind the black stuff digs up dirt to burn
• Cameron left one frantic person working mostly in the dark
• Loretta Lynn's father was one
• Underground shaft worker
• Worker who needs to be light-headed?
• Underground worker
• Excavator runs in pursuit of one claim in rocky situation
• Worker in a pit