ROPE BOLT Russian patent published in 2018 - IPC E21D21/00 

FIELD: mining engineering.

SUBSTANCE: invention relates to the mining industry and can be used to support the contour of underground mining workings. The rope bolt with the an ampoule of fastening mixture in a hole includes a head of the rope bolt. It is made in form of jaw wedge which has wedge, a spreading jaw and spring rings for holding the jaw. The rope bolt is made of twisted strands consisting of a set of wires. There are also movement limiters, a supporting washer, a coupling with a tension nut, a clamped wedge. The head on the downhole end of the rope bolt is made in the form of a conical screw with self-tapping thread. The head has a gap with the spreading jaw and the wedge held on the opening jaw by spring rings. The spreading jaw has a cylindrical shape with a bevel and a bottom axial hole for fixing the rope. The coupling on the outer surface has a thread and a nut for tightening the rope, and at the end includes holes (grooves) for releasing the ends of strands that do not carry the main load of the rope. The coupling has a channel inside for passing and fastening the rope that repeats the form of the clamping wedge in which a deformation gap is located along the entire length, and a second deformation gap cut perpendicular to the first one on both sides of the conical part. The rope is inserted in the channel. The bearing parts of the rope are inserted into the hole of the clamping wedge which has a conical shape transforming into a cylindrical one. For reliable fastening of the clamping wedge inside the end of the coupling there is a thread on which the bolt of the clamping wedge can be supported after rope tension.

EFFECT: increase the reliability of bolt fastening in the hole and the ends of the rope.

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