Method and device for installing a self-drilling expandable...

Details Method and device for installing a self-drilling expandable... Method and device for installing a self-drilling expandable...

2008-05-27

2008-05-27

Lagman, Frederick L. (Department: 3672)

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

C405S259100, C405S259500

Reexamination Certificate

active

07377724

ABSTRACT:
In a method and a device for installing, in a rock wall or roof, a self-drilling expandable rock bolt (2) having a drill bit portion (5), an expansion portion (9) and a connecting portion (10), in a rock breaking step, the self-drilling rock bolt (2) is provided with a rock breaking movement and flushing fluid for producing a bore hole, and in an expansion step, pressurized expansion fluid is introduced into the expansion portion (9) in order to expand it so as to be fixed to the inside of the bore hole. Expansion fluid is introduced by means of a swiveling device (6) so that the rock bolt (2) is free to move during the rock breaking step, and be tightened against the rock bolt (2) in the expansion step in such a way that a sealed channel for expansion fluid is established between an expansion fluid source and the expansion portion (9). The invention also concerns a self-drilling rock bolt.

REFERENCES:
patent: 4423986 (1984-01-01), Skogberg
patent: 7080697 (2006-07-01), Mocivnik
patent: 7270501 (2007-09-01), Kanflod et al.
patent: 2005/0084339 (2005-04-01), Meisenbichler et al.
patent: 2007/0081864 (2007-04-01), Iwasaki et al.
patent: 2007/0274788 (2007-11-01), Ravat
patent: 4024869 (1991-02-01), None
patent: WO 2005047651 (2005-05-01), None
patent: WO 2005047652 (2005-05-01), None
JP 2002-174100, Published Jun. 21, 2002.

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