ROPE ANCHOR Russian patent published in 2022 - IPC E21D21/00 

FIELD: mining.

SUBSTANCE: invention relates to the mining industry and can be used for securing the contour of underground mine workings. Rope anchor for installing in a blast-hole includes an ampoule with a fixing mixture, a rope anchor head, a rope made of twisted strands consisting of multiple wires, fixing mixture movement limiters, a backplate, a coupling with a tension nut, and a clamping wedge. A conical screw is installed at a distance l=5 to 10 mm from the end of the rope as the rope anchor head, the diameter of the base whereof d_scr is determined from the expression d_scr = 0.8 d_bh, where d_bh is the diameter of the blast-hole. The coupling has a thread and a rope-tensioning nut on the outer surface, and at the end, a hexagonal surface with a cylindrical shank with a width l₁=5 to 10 mm and a radius inscribed in a regular hexagon. On the inside, the coupling has a channel for passing and securing the rope, matching the shape of the clamping wedge, wherein a deformation slot is made, and a channel for passing the strands of the bearing part of the rope, shaped as a cone transitioning into a cylinder. The length of the clamping wedge L_wed=(11-13)d_cl, where d_cl is the diameter of the clamped bearing part of the rope. The length of the conical part of the wedge L_wc=(0.5-0.7)L_wed. The angle of inclination of the conical surface of the clamping wedge is within the range α=2.5-3.5°. The clamping wedge is therein made by lost-foam casting (LFC technology). The width of the deformation slot in the clamping wedge l_w depends on the diameter of the clamped bearing part of the rope and is within the range l_w=2.2-2.7 mm.

EFFECT: increase in the manufacturability of the anchor, increase in the reliability of securing the rope without a reduction in the strength characteristics of the rope.

1 cl, 4 dwg