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US 5,143,340 AGranted
Load support
AssigneeFosroc International Limited
InventorsRichard R. Wood, Norman J. Cook, John R. Thorpe
Life of this patent
Estimating the term…
Abstract
A support between the floor (22) and the roof (24) of e.g. a mine stope, is made by using an inflatable container comprising an inner bag (10), received in an outer bag (12). An inlet valve (14) extends through both bags as does a relatively higher pressure relief outlet valve (16). In use, air is pumped into the container until it is fully inflated, following by a grout, the air escaping via the valve (16) until the inner bag (10) is filled.
Claims10
A method of providing a load support between a floor and a roof of a structure, the method comprising:
- placing a container having an inflatable water impervious bag with an interior compartment in a space between the floor and the roof, the container having both an inlet valve and a pressure relief outlet valve communicating with the interior compartment, the valves being spaced apart and in use arranged with the outlet valve uppermost;
- locating the container at a desired location for providing the load support;
- introducing a gas via the inlet valve into the interior compartment until gas escapes through the pressure relief outlet valve to fully expand the container free of any support to its side walls toward the floor and the roof;
- supplying a settable material into the water impervious bag of said container via the inlet valve while allowing the gas to escape via the outlet valve until the container contains sufficient settable material under pressure to support the roof relative to the floor, said water impervious bag allowing the material to set therein without allowing leakage of liquid therefrom.
1 more element
Dependencies are inferred from the claim text.