coal‧face /ˈkəʊlfeɪs $ ˈkoʊl-/
noun British English1. [countable] the part of a coal mine where the coal is cut from the ground
2. at the coalface where the real work is done, not just talked about:
Academics will be working at the coalface alongside the doctors. [TahlilGaran] Dictionary of Contemporary English ▲