Ice crib

Details Ice crib Ice crib

E - Fixed Constructions

21

D

61/57

E21D 15/00 (2006.01)

Patent

CA 1237905

ICE CRIB Abstract An ice crib for use in retreat mining to support the overburden is formed of fresh water ice, the freezing and melting of which is controlled in situ by flow therethrough of temperature regulated brine. - 1 -

479563

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