Excavation roof support and method of installing the same
AssigneeBochumer Eisenhutte Heintzmann GmbH & Co. KG
InventorsManfred Koppers, Karlheinz Bohnes, Harry J. Fitzgerald
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Abstract
A method and a system are disclosed for supporting an overburden. A single-section or telescoped multi-section longitudinally slit prop casing of light sheet material such as cardboard or metal has a fabric bag installed in it. When the casing is erected the bag is filled with a slurry of hardenable substance which, upon hardening, forms in the bag a column which supports the overburden. The casing may be left in place or it may be removed for re-use.
Claims16
A method of supporting an overburden, particularly a roof of an underground excavation such as a mine, comprising the steps of providing a hollow tubular prop casing having at least one section of self-supporting sheet material and which is circumferentially incomplete and has a longitudinally extending slit;
- overlapping marginal portions of said sheet material which bound said slit, to an extent requisite for obtaining a desired diameter of said section;
- arresting the overlapped portions in their overlapped condition;
- erecting the prop casing;
- installing in the prop casing a fabric bag extending lengthwise of the casing;
- and filling the fabric bag with a hardenable substance in flowable condition so that under the influence of the entering substance and shaped by the casing, the bag and its contents form a column which, upon hardening of the substance, is by itself able to support the roof.
A roof supporting arrangement, particularly for supporting a roof of an underground excavation such as a mine, comprising a hollow tubular prop casing having at least one section of self-supporting sheet material and which is circumferentially incomplete and has a longitudinally extending slit bounded by marginal portions which can be overlapped to a desired degree to give said section a selectable diameter;
- means for arresting the marginal portions in a desired overlapped position;
- fabric bag means insertable into the section;
- and means for filling the fabric bag means with a hardenable substance in flowable condition so that the fabric bag means accommodates itself to the casing and the substance, upon hardening thereof, forms in the fabric bag means a solid column which is by itself able to support said roof.
Dependencies are inferred from the claim text.