How deep down is a bituminous coal mine vertical shaft?

There are 2 kinds of coal mine shafts-- slope or dug horizontally then down, or a vertical shaft dug nearly straight down. Some coal mines use both--a wide tunnel dug as a slope, then down. However, in the 1800s, they often crawled into a slope mine.

Depth of either type, and for either bituminous coal or anthracite coal, can be 1,000 to 2,000 feet underground. Most mines also have labyrinths of tunnels throughout, which can go to different depths.