(RTTNews) - Core Natural Resources, Inc. (CNR) rose 7.49%, closing at $90.00, up $6.27, after the company announced the resumption of longwall mining operations at its Leer South mine in West Virginia ...
Gob-side entry retaining (GER) constitutes a strategic advance in longwall coal mining whereby a roadway alongside the goaf is preserved without leaving a permanent coal pillar. By combining ...
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