Yielding head for mine support

Details Yielding head for mine support Yielding head for mine support

E - Fixed Constructions

21

D

E21D 21/00 (2006.01)

Patent

CA 2223208

A yielding head for reducing the need to recondition a rock mass. The yielding head includes a mine hole cradle and a longitudinally movable bar therein. The bar, which is connected to an extension bolt, is registered with a collapsible bubble serrated yielding element circumscribing the bar. As the rock mass is displaced the bar is drawn into the mine hole. The yielding element absorbs the stress on the bar in a controlled manner.

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