Mine support grout bags and grout packs
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United States of America Patent
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Apr 9, 2013
Grant Date -
Sep 30, 2010
app pub date -
Sep 29, 2008
filing date -
Oct 24, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
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.
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