Seen this one firsthand. Many of the processes now in mining are highly automated and quite complex. I've worked at Coal mines as an electrical engineer in the past. Many, many, electricians (Regular electricians need not apply, you'll need MSHA certification and typically state certification for mining as well), Many professional welders, many plumbers ( Fire suppression systems, Water sprays for dust suppression, cooling loops in modern equipment, etc...). You'd be surprised how many processionals it takes at a modern coal mines. The jobs pay well...but dang is it rough on you. Last one I was at was a 21" seam height, maybe 23" of clearance in a good spot... Rough as all heck on the body. When a layoff hit a buddies mine a few months back he was told to go back and earn his welders certification and he might be able to land a job down the road....he already had his welders certs, the job down the road was 1/4 the pay. He left the area and is working in Canada now, need to call and see how he's doing.Yep, the coding bros went from telling coal miners to learn how to code and then now they will have to learn welding or plumbing.