الصفحة الرئيسية > Term: heading-and-bench
heading-and-bench
A method of tunneling in hard rock. The heading is in the upper part of the section and is driven only a round or two in advance of the lower part or bench.
- قسم من أقسام الكلام: noun
- المجال / النطاق: التعدين
- الفئة: تعدين عام; Mineral mining
- Government Agency: USBM
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المنشئ
- ed.young
- 100% positive feedback
(Milwaukee, United States)