Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1978-05-12
1980-03-11
Corbin, David H.
Hydraulic and earth engineering
Earth treatment or control
Chemical
405259, E21D 2002
Patent
active
041926315
ABSTRACT:
A rock formation, such as the roof of a mine tunnel, is reinforced by use of the apparatus of the invention to provide an anchor for a rock bolt which is tensioned to hold a support plate or similar structure in firm engagement with the face of the rock structure. The apparatus includes an elongated bar threadedly engaged with one end of a hollow collar, the other end of which is threaded to receive the rock bolt. An installation tool in the form of an elongated rod is provided at one end with outwardly extending fixed members for engagement with stop surfaces on the other end of the collar. Rotation of the tool is transmitted to the collar and bar to break a resin cartridge within a blind drill hole in the rock formation and mix the contents thereof. Upon hardening of the resin mixture about the bar, the installation tool is withdrawn and the rock bolt carrying a roof support plate is threaded into the anchored collar and tensioned to the desired degree.
REFERENCES:
patent: 3979918 (1976-09-01), Vidler
patent: 4051683 (1977-10-01), Koval
Corbin David H.
McGuire Charles S.
The Eastern Company
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