Roof bolt anchor

Details Roof bolt anchor Roof bolt anchor

1991-12-16

1993-02-09

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

411 33, 411 75, E21D 2100

Patent

active

051849224

ABSTRACT:
An anchor for securing a mine roof bolt within a hole preformed within a rock strata. The anchor comprises a plurality of transversely bent plastic leaves, each having an aperture through which the roof bolt is received, a support nut threadably connected to the bolt for supporting the plastic leaves, a stirrup supported on the support nut and on which the leaves are rested and a compression nut threadably connected to the roof bolt above the leaves for compressing the leaves against the stirrup responsive to the rotation of the roof bolt in a selected direction. As the transversely bent leaves are compressed the edges thereof are urged against the strata to grip the same and thereby secure the roof bolt within the hole. The stirrup and the compression nut are shaped to maintain the leaves at a selected inclinations during compression.

REFERENCES:
patent: 2950602 (1960-08-01), Lang
patent: 4147458 (1979-04-01), Elders
patent: 4295760 (1981-10-01), Warner
patent: 4626139 (1986-12-01), Blackwell

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