Again, it's my pleasure!!! I love the Anthracite videos and pics!
Let me give you a picture to show you what they do (not much different than over in Western PA and Ohio).
On the top is how they "USED" to do it if they had big contracts, lots of customers, and needed the coal yesterday. The big shovels, like this one (The Marion 5960) would dig overburden only. Today, they are just using draglines like the refurbished one on the bottom to uncover the coal. After they uncover it, small loading shovels or front end loaders will dig out the vein and load the haul trucks as the dragline moves down the pit. The shovels from "yesterday" would dig down to the vein and then walk over the top of it while all the loaders went in behind and removed the vein. As they both worked together like this, the pit would advance. The shovels, the big ones like this one pictured, were the way to go but operating cost were high and they could dig you out of a job pretty fast. LOL!
The dragline on the bottom, a Page 752LR Digital Walking Dragline should start digging any day now. The shovel on the top here, which I got to get on because my dad worked on it, was scraped in 1989 unfortunately. It was the fourth largest in the world at the time too darn it!
Keep up the great work on the videos!!!