Patent ID: 7374370

Claim:
A rock bolt anchor having chemical and mechanical means for anchoring a rock bolt in a drilled hole having a wall, said rock bolt anchor attached to the threaded end of said rock bolt and inserted into said drilled hole thereby forming an annulus having a top and a bottom, said annulus located between said wall of the drilled hole and the rock bolt anchor, wherein the rock bolt anchor comprises: a. a top portion having a longitudinal axis and adapted to protectively carry said chemical means, wherein the chemical means comprises a package of adhesive resin adapted to fill said annulus thereby chemically anchoring the rock bolt into the drilled hole; and; b. a co-axial bottom portion fixed permanently to said top portion, wherein said bottom portion is adapted to carry said mechanical means, and wherein the mechanical means comprises a pair of opposed outer shells adapted to move into a binding contact with the wall of the drilled hole thereby mechanically anchoring the rock bolt into the drilled hole; wherein the top portion comprises: a first bail for fixing said top portion to said bottom portion; a second bail co-axial with said first bail and positioned underneath the first bail; and, a spring loaded resin release mechanism for compressing said package of adhesive resin and then forcing the resin contained in the package of adhesive resin out of the package and into the annulus.