Hydraulic and earth engineering – Earth treatment or control – Rock or earth bolt or anchor
Patent
1985-10-21
1988-04-12
Corbin, David H.
Hydraulic and earth engineering
Earth treatment or control
Rock or earth bolt or anchor
405261, E21D 2100
Patent
active
RE0326453
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.] 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. The invention includes a method of effecting dynamic rock stabilization by placing a body of formable material in a bore hole and inserting an anchor rod into the body so it engages the body and initiates a cooperative reaction between the bore hole and the rod to stabilize the rock structure.
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Corbin David H.
Scott Investment Partners
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