The coal is clearly "mine run", or not crushed and graded. I saw bituminous
coal like this dumped in front of people's houses in southern Ohio in the 60s.
Just takes a couple of whacks with and axe or hammper to break it up.

Anthracite is something much more difficult when it comes to breaking lumps.

Chuck Yungkurth
Boulder CO, but raised in Smokestack America