Mine roof support anchor and process for installing the same

Details Mine roof support anchor and process for installing the same Mine roof support anchor and process for installing the same

1988-06-21

1989-08-22

Reese, Randolph A.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

411 78, 411 79, E02D 2000, F16B 1304

Patent

active

048591181

ABSTRACT:
A mine roof support anchor and process for installing the same. The anchor comprises a pair of wedge members, each of which has tapered surfaces adapted for interengagement to effect expansion of the shell into gripping engagement with the mine roof. The wedge members are joined by a connector at one end thereof. Upon threading the roof bolt through one wedge member, the upper end of the bolt engages the connector, thereby effecting upper movement of the other wedge member and downward movement of the one wedge member, causing rapid expansion of the shell. External ribs on one of the wedge members engage the mine roof after partial expansion of the shell to limit upward movement of the wedge member. A vertical rib on the wedge member through which the roof bolt is threaded prevents rotation thereof during the rotation of the bolt through the anchor.

REFERENCES:
patent: 1993749 (1935-03-01), Pleister
patent: 2878709 (1959-03-01), Horvath
patent: 3181414 (1965-05-01), Dickow
patent: 3188815 (1965-06-01), Schuermann et al.
patent: 3221590 (1965-12-01), Dickow
patent: 3342097 (1967-09-01), Rocheleau
patent: 4275637 (1981-06-01), Herb et al.
patent: 4556344 (1985-12-01), White
patent: 4605350 (1986-08-01), Chater et al.

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