Method and equipment for performing rock bolting

Details Method and equipment for performing rock bolting Method and equipment for performing rock bolting

1984-02-23

1986-03-18

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Chemical

405261, E21C 1100

Patent

active

045765251

ABSTRACT:
A method for performing rock bolting, according to which a cementing agent is fed into a hole drilled into the rock, whereupon a bolt is fitted into the drill hole for supporting the rock. In order to permit use of a rapidly hardening cementing agent and mechanization of the bolting, a number of capsules (16) are fed to the bottom of the drill hole, which capsules contain a preferably two-component cementing agent which hardens rapidly when the components are mixed together, and a conventional cementing agent (12) hardening slowly and/or protecting the bolt against corrosion is fed into the remaining portion of the drill hole by means of a feeding pipe (5). The equipment for carrying out the method comprises a guide (14) for shifting a capsule/capsules (16) form a charging station (15) into the drill hole, means (22) for moving the guide axially back and forth, means (17) for shifting the capsule/capsules (16) along the guide (14), and a nozzle (9) to be positioned at the mouth of the drill hole, through which nozzle both the guide (14) and the feeding pipe (5) can be shifted alternatingly into the drill hole.

REFERENCES:
patent: 4215953 (1980-08-01), Perraud
patent: 4226559 (1980-10-01), Prebensen
patent: 4229124 (1980-10-01), Frey et al.
patent: 4398850 (1983-08-01), Talvensaari
patent: 4420277 (1983-12-01), Hibbard et al.

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