Surface Mining
-Used when a coal seam is located close to the surface
-Holes are drilled and filled with explosives to clear the over burden
-Holes are drilled and filled with explosives to clear the over burden
Underground Mining
-Used when the coal seam lies deep in the earth
-Large tunnel systems are dug
-3 types
-Slope- Tunnel slopes down towards the coal
-Drift- Mines are on the side of a hill
-Shaft- Large hole drilled straight down
-Most common in United States
-Large tunnel systems are dug
-3 types
-Slope- Tunnel slopes down towards the coal
-Drift- Mines are on the side of a hill
-Shaft- Large hole drilled straight down
-Most common in United States
http://www.ildceo.net/NR/rdonlyres/D54DB23B-BFCC-49D7-9D73-89448384DD94/0/Howiscoalmined2.pdf
http://www.coalcampmemories.com/miningmethods.html
http://completelybaked.blogspot.com/2011/09/industry-shill.html
http://www.coalcampmemories.com/miningmethods.html
http://completelybaked.blogspot.com/2011/09/industry-shill.html