Abstract: A tandem plate for use with a friction rock stabilizer of the kind that includes an elongated metal tube driven into a bore drilled in a rock wall and having an end adapted to engage a bearing plate. The tandem plate includes a substantially planar metal sheet having an upper surface, a lower surface and an overall dimension which is larger than the size of the bearing plate. An opening adjacent the center allows the tube to pass therethrough. The lower surface engages the rock wall while the upper surface of the tandem plate engages the bearing plate. A tabs on the upper surface, formed by punching and bending parts of the planar sheet from which the tandem plate is made, engage the bearing plate while the tube is being driven into the bore. A plurality of ribs formed on the tandem plate increase the strength thereof.

Abstract: A friction rock stabilizer includes an elongated metal tube having and interior and an exterior surface with a distal end and a proximal end. The distal end is tapered and a flange is positioned adjacent the proximal end. The tube further includes a slit that runs substantially the entire length thereof. The tube is constructed so as to be capable of being positioned within a bore formed in the wall of a mine. An internal sleeve is located adjacent the distal end of the tube. A tapered expander is also located within the interior of the tube adjacent the distal end and is actuatable from the proximal end of the tube after the point anchor is installed in a bore. The tapered expander expands the distal end of the tube to firmly anchor the stabilizer in the bore.

Abstract: A friction rock stabilizer includes an elongated metal tube having and interior and an exterior surface with a distal end and a proximal end. The distal end is tapered and a flange is positioned adjacent the proximal end. The tube further includes a slit that runs substantially the entire length thereof. The tube is constructed so as to be capable of being positioned within a bore formed in the wall of a mine. An internal sleeve is located adjacent the distal end of the tube. A tapered expander is also located within the interior of the tube adjacent the distal end and is actuatable from the proximal end of the tube after the point anchor is installed in a bore. The tapered expander expands the distal end of the tube to firmly anchor the stabilizer in the bore.