Friction rock stabilizer with point anchor
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.
1. A friction rock stabilizer comprising:
an elongated metal tube having and interior and an exterior surface and including a distal end and a proximal end, said distal end being tapered, a flange located adjacent said proximal end, said tube further including a slit running substantially the entire length thereof, said tube being capable of being positioned within a bore formed in the wall of a mine;
an internal sleeve located within and adjacent said distal end of said interior of said tube, said sleeve being moveable within said tube, and
tapered expander means located within said interior of said tube adjacent said distal end, said tapered expander means being actuatable from said proximal end after said stabilizer is installed in a bore to expand said sleeve and said distal end of said tube so as to firmly anchor said stabilizer in said bore,
wherein said tapered expander means is circular in cross section and includes a reduced diameter portion, an increased diameter portion and a chamfered area between said two portions.
2. The friction rock stabilizer of claim 1 wherein said tapered expander means is located within said sleeve.
3. The friction rock stabilizer of claim 1 wherein said sleeve has a slit extending the length thereof.