subbtiminous coal produced by suface mining in india

Surface mining - Wikipedia- subbtiminous coal produced by suface mining in india ,The profound changes in topography and disturbance of pre-existing ecosystems have made mountaintop removal ... Act of 1977 mandates reclamation of surface coal mines.coal surface mining photos - mine-engineer.comA surface coal mine in Wyoming, which has a 60 foot thick seam of coal, sub bituminous and lignite, which is why the coal has a brown tint. This large surface coal mine used draglines, shovels to mine the coal.