Home > Term: breaking prop
breaking prop
Arkansas. One of a row of props of sufficient strength to cause the rock above the coal to break and so limit the area of top brought down by a brushing shot.
- Kalbos dalis: noun
- Pramonės šaka / sritis: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
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- ed.young
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(Milwaukee, United States)