Home > Term: opener hole
opener hole
The first hole or holes fired in a round blasted off the solid to create an additional free face in a coal mine.
- Μέρος του λόγου: noun
- Κλάδος/Τομέας: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
0
Δημιουργός
- ed.young
-
(V.I.P) 21084 points - 100% positive feedback
(Milwaukee, United States)
