Controlled expansion of rock bolt

Details Controlled expansion of rock bolt Controlled expansion of rock bolt

2008-01-22

2008-01-22

Lagman, Frederick L. (Department: 3673)

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

C405S259100

Reexamination Certificate

active

10555026

ABSTRACT:
The present invention is related to a method for manual installation of rock bolts expandable by means of a pressure media comprising manual coupling of a pressure source to a rock bolt to be expanded. The method comprises the steps of an operator starting a sequence whereby the rock bolt is pressurized to a predetermined pressure, and it being ensured that the predetermined pressure is kept for a predetermined period of time. The present invention is also related to such a control system, and an apparatus comprising such a control system.

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patent: 4511289 (1985-04-01), Herron
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patent: 4696606 (1987-09-01), Herron
patent: 4954017 (1990-09-01), Davis et al.
patent: 5765969 (1998-06-01), K.ang.reby et al.
patent: 5997219 (1999-12-01), Krzysztalowicz et al.
patent: 0272233 (1988-06-01), None

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