Supporting of excavation roofs
AssigneeBochumer Eisenhutte Heintzmann GmbH & Co. KG
InventorsManfred Koppers, Klaus Spies, Karlheinz Bohnes
Life of this patent
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Abstract
Roofs of underground excavations are supported by forming sheet-material elements into tubes whose diameter can be varied by changing the overlap between the longitudinal edges of the rolled-up sheet material, standing the tubes upright to bear against the roof and the floor of the excavation, and filling them with hardenable material in flowable condition which, after hardening, will form a roof-supporting column.
Claims17
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 bounding 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 so that it bears upon the roof to be supported;
- and filling the prop casing with a hardenable substance in flowable condition so that said substance, upon hardening thereof, forms a solid column which 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;
- and means for filling the prop casing, subsequent to erection of the same so that it bears upon the roof to be supported, with a hardenable substance in flowable condition so that said substance, upon hardening thereof, forms a solid column which is by itself able to support said roof.
Dependencies are inferred from the claim text.