Mine tunnel’s lightweight mix expedites extraction schedule
- Published: Friday, 17 August 2012 15:07
- Written by CP Staff
Elemix concrete additive, an engineered lightweight synthetic particle (LSP) that uniformly reduces the weight of concrete, was used in a backfill mix for a 1,700-ft.-long, 26-ft.-wide mine slope built by Arch Coal, Inc. in Grafton, W.Va. The new Leer Mine will be a world-class underground facility, with projected annual output of 3.5 million tons of premium metallurgical coal.