Beneath parts of the Appalachian Mountains, thousands of mine shafts still descend deep into the earth. Some of these vertical passages drop more than 1,000 feet, connecting long corridors carved ...

A new method could transform abandoned coal mines across the U.S. into massive underground batteries for clean energy.

At a mine of the Sunnyhill Coal Co. near New Lexington, Ohio one day last week, amazed mine experts watched a huge (26-ton) machine in action. With surprisingly little noise, it tore into a seam, ...

On Aug. 31, MSHA published a proposed rule in the Federal Register to require underground coal mines to equip continuous mining machines with proximity detection systems in order to protect miners ...