Mine support grout bags and grout packs

Details Mine support grout bags and grout packs Mine support grout bags and grout packs

E - Fixed Constructions

21

D

E21D 15/48 (2006.01) E21D 11/15 (2006.01)

Patent

CA 2703656

A grout bag assembly (1) is provided comprising an inflatable grout bag (2, 26, 34, 40) having a top (4, 42), bottom (6) and generally cylindrical sidewall (8) with an inlet (10) for fluent settable grout material. An inner bag (14, 28, 38) is attached to the grout bag such that upon filling of the grout bag the inner bag forms a generally axially extending separate compartment (18) within the grout bag. The inner bag preferably has a separate inlet (20) accessible from the exterior of the grout pack after the grout bag has been installed. The inner bag is generally attached to the inside of the grout bag such that a space of optionally varying radial size is formed between the inner surface of the grout bag and the outer surface of the inner bag.

L'invention concerne un ensemble de sacs de coulis (1) comprenant un sac de coulis gonflable (2, 26, 34, 40) présentant une paroi supérieure (4, 42), une paroi inférieure (6) et une paroi latérale généralement cylindrique (8) pourvues d'un orifice d'admission (10) pour un matériau de coulis durcissable fluide. Un sac intérieur (14, 28, 38) est fixé au sac de coulis de sorte que, lors du remplissage du sac de coulis, le sac intérieur forme un compartiment séparé s'étendant généralement axialement (18) à l'intérieur du sac de coulis. Le sac intérieur a de préférence un orifice d'admission séparé (20) accessible depuis l'extérieur de l'emballage de coulis après l'installation du sac de coulis. Le sac intérieur est généralement fixé à l'intérieur du sac de coulis de façon à former un espace d'une taille radiale éventuellement variable entre la surface interne du sac de coulis et la surface externe du sac intérieur.

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