Mine roof support
AssigneeSetevox (Pty) Ltd
InventorJohann Adriaan Venter
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Abstract
A yielding mine roof support is provided which is made in the form of a hollow tube made from an epoxy, phenolic, or polyester fiberglass composite.
Claims17
A yielding mine roof support, in a form of a hollow tube made from a composite selected from the group consisting of an epoxy fiberglass composite, a phenolic fiberglass composite, and polyester fiberglass composite, wherein a wall thickness of the hollow tube is between 1 mm and 15 mm, wherein a fiber orientation of the fiberglass along a length of the hollow tube is of from 1% to 49% radial orientation and wherein a balance of the fiber orientation is of a longitudinal orientation, wherein the fiber orientation is configured for balancing between hoop strength and longitudinal tensile strength, wherein the hollow tube tapers over at least a portion of the length of the hollow tube, wherein the tapered portion of the hollow tube is from 25 mm to 150 mm in length and is located at an end zone of the hollow tube, wherein a total weight of the support is from 9 kg for a 1.5 m length support to 6 kg for a 1 m length support, and wherein the yielding mine roof support is configured to support a load of a roof of a mine with a yield design point at 40 tons.
Dependencies are inferred from the claim text.