Abstract: A method of anchoring a spirally wound multi-strand cable in a borehole by using resinous material intermixed with the cable strands upon gripping the cable strands at one end to unwind the strands initially for forcing the cable into a borehole and for rewinding the strands to restore the cable to its spirally wound condition, and apparatus for applying cable rotating and thrusting reaction for securing retention of the cable in a borehole with a resinous anchor material.

Abstract: A cable truss system for providing support for underground drifts in geologic structure in a first stage from anchor members secured in the geologic structure for leaving end portions in the drift to which a first system of supports are secured to engage on the geologic structure disturbed by the drift formation, and cable truss members connected to the first system of supports for establishing a second stage of support for the geologic structure disturbed by the drift formation.

Abstract: A cable bolt mine roof crib for support and stabilization of roof rocks employing a series of cable bolts and/or cable members through a cribbing frame for actively supporting the roof and area surrounding an underground opening. The support imposes a restraint on geologic movement of the roof by the placement of rock anchors on the ends of cables at depth through the rock mass. The anchor portions of the cable bolts are placed beyond the zone of failure that would normally take place around an underground opening. The roof crib provides a bearing area for the roof rock which limits deformation and offers support by suspension to maintain interlock of rock fragments of the roof of the underground opening. The strength and length of cable bolts can be adjusted to fit initial tectonic load conditions and subsequent loads placed upon the opening by adjacent mining.

Abstract: A multiple cable rock anchor comprising an assembly of a plurality of individual elongated cables having an attachment for joining a first end of each cable in association for common movement, or wrapped to loosely hold them together without restricting relative sliding movement in bending. The assembly of multiple cable rock anchor being manipulated by bending for installation in a borehole formed in a geologic structure where there is a drift dimension less than the desired length dimension of the elongated cables, thereby forcing the cables to be bent upon being inserted in the borehole. Further, the assembly of cables have different strengths, dimensions and lengths.

Abstract: A yieldable grout compactor for a cable roof support fixture adapted to be insertable in a uniform diameter borehole or in a stepped borehole in which the grout cartridge and compactor are insertable so as to have the cable perform the piercing and mixing function with respect to the grout material while the compactor is slidable on the cable caused by a sufficient degree of force to permit the grout to surround and anchor the cable. Compactor sleeves are sized with respect to the axial cable length and the internal and external diameters are sized to yieldably permit fixture installation and grout securement of the cable in a manner to obtain a secure anchor for the cable in the back of the borehole.

Abstract: Dynamic rock stabilization apparatus in the form of an anchor fixture for use with a roof plate in which the fixture has an anchor rod formed with a surface configuration extending from a lead-in end to the opposite headed end for at least a part of the length of the rod, and a hollow body providing a wall of formable and compressible material having a length less than the depth of a bore hole in the rock structure into which it is to be placed between the rod and the surface of the bore hole, the body engaging the surface configuration of the rod to effect a locking engagement with the rod such that when assembled in a bore hole the body wall has a thickness sufficient to be compressed between the rod surface configuration which has a diameter less than the bore hole and the bore hole surface, and to apply dynamic forces through the rock as a result of the compressibility of the body.

Abstract: Anchor fixture for dynamically stabilizing rock structure comprising a rock support mounted in a bore hole and cooperating with formable means placed in the bore hole to generate tension in the support and to exert compression in the rock structure for dynamically supporting the rock structure upon insertion of the rock support and rapidly developing radial loading forces in the rock and beyond the near boundary of the bore hole.

Abstract: .[.Anchor fixture for dynamically stabilizing rock structure comprising a rock support mounted in a bore hole and cooperating with formable means placed in the bore hole to generate tension in the support and to exert compression in the rock structure for dynamically supporting the rock structure upon insertion of the rock support and rapidly developing radial loading forces in the rock and beyond the near boundary of the bore hole..]. .Iadd.