coalface

1. The surface of coal exposed by mining, or a part of a coal seam that is currently being mined.

   the part of a coal seam that is being cut

2. The end of a drift, entry, or room in a coal mine.

3. (UK, figuratively)A place where difficult or strenuous work is done.

4. (UK, figuratively)A place where more tangible, practical, or direct work of an activity is done, as opposed to theoretical or managerial work.

regular