Cornwall has a rich mining history, and an old Cornish word for “Mine” is “Wheal” with an alternate spelling of “Huel”. Examples: Wheal Jane; Huel Penrose.
I have been using Huel for just over 3 years, mainly to replace my lunch at my day job, but I also take Huel with me to my weekend pastime — working as a volunteer at a narrow gauge railway in the Forest of Dean which includes a working underground mine.
Miners would nickname their lunch “snap” or “bait” with Cornish miners (famous for creating the Cornish Pasty) using the name “Crust” or “Croust” for their meal.