Surface Being Worked to Remove Bituminous Lumps

This page is the CodyCross answer for the clue below from Cruise Ship, Group 646, Puzzle 4 (Buffet Area).

Question is: Surface Being Worked to Remove Bituminous Lumps

and the answer is: COALFACE

Word Meaning:

COALFACE — (mining) The surface of coal exposed by mining, or a part of a coal seam that is currently being mined.

Definitions from Wiktionary.