Yielding mine prop

Details Yielding mine prop Yielding mine prop

E - Fixed Constructions

21

D

254/117

E21D 15/00 (2006.01) E21D 15/28 (2006.01) E21D 15/32 (2006.01) E21D 15/42 (2006.01) E21D 15/43 (2006.01) E21D 15/44 (2006.01)

Patent

CA 2012302

ABSTRACT A mine prop has a plunger and cylinder made of tubular steel. The cylinder has a flared mouth and a cone collet adapted to grip the plunger is shaped complementally to the flare. The ends of the plunger and cylinder are domed. The prop is set by jacks acting between the cone collet and a clamp detachably secured to the plunger.

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