Mountaintop mining fact book

Mountaintop mining fact book Mountaintop mining (MTM) is a surface mining technique that is used to safely and efficiently extract coal reserves near the surface in the steep terrain conditions characteristic of Central Appalachia. During MTM, multiple coal seams are uncovered by removing the overburden and interburden (the rock situated above and between seams), which are then placed on previously mined areas or within engineered fill areas.