workface

The exposed surface of an underground mine that is currently being worked

日本語の意味

作業中の地下鉱山で露出している採掘面

The shift foreman carefully inspected the workface to ensure all supports were secure.

交替班の監督は支保工がすべてしっかりしているか確認するために採掘面を注意深く点検した。

意味（1）

The exposed surface of an underground mine that is currently being worked

workfaces

（ plural ）