Resin Mixing and Cable Tensioning Device and Assembly for Cable Bolts

Abstract

The present invention is directed to a device and assembly for the anchoring and tensioning of cable bolts used in earthen formations to stabilize the earthen structures to prevent or minimize the caving in or sluffing-off of the earthen structure. The new invention presents an integral wedge barrel and threaded sleeve which can be turned to facilitate both the mixture of cementing resins and the physical tensioning of an anchored cable and which can reduce or prevent undesirable twisting of the cable during tensioning.

Description

RELATED INVENTIONS[0001]This application is a Continuation-in-Part of my co-pending application Ser. No. 12 / 022,051 filed on Jan. 29, 2008, for Resin Mixing and Cable Tensioning Device and Assembly For Cable Bolts.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a device and assembly for cable bolt systems. In particular, the present invention relates to cable bolt apparatus which can be used to both mix associated cable resin and to tension the cable bolt assembly against a bearing plate.[0004]2. Background and Related Art[0005]Steel bolts and cable bolts are commonly used in underground mines to stabilize geologic layers adjacent mine openings. For example, cable bolt assemblies are used to secure the geologic layers of the roof of a mine tunnel or drift to prevent roof strata from falling and causing obstructions or injury to persons or equipment in the tunnel.[0006]Rigid members such as steel rods or rebar have long been used in an...

AI Technical Summary

Benefits of technology

[0021]In use, the device permits reliable mixing of epoxy resin components by rotating the nut until it abuts the wedge barrel whereupon the cable will spin in the direction the nut is being turned. This turning or spinning action can be used to mix the epoxy resins.

[0024]The structure of the aperture of the bearing plate and the threaded sleeve disposed in the aperture permit the threaded sleeve to slide through the bearing plate to permit tensioning while at the same time reducing or preventing any twisting of the cable-bearing threaded sleeve within the aperture.

Problems solved by technology

Rigid steel rods are, however, not always ideal because they are manufactured in finite, fixed lengths and long rods are often difficult to work with in confined spaces such as construction and mining sites.

Historically, anchoring a cable at one or both ends is more difficult because the cable does not bear threads to receive bolts.

This can cause a slight decrease in the length of the cable.

Upon release of the torquing device the cable can untwist thereby returning to its longer repose length and causing an undesirable decrease in the tension on the cable.

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