Hydraulic and earth engineering – Miscellaneous
Patent
1987-10-26
1989-05-23
Corbin, David H.
Hydraulic and earth engineering
Miscellaneous
173 22, 173 39, 405259, 405260, E21D 1100
Patent
active
048325368
ABSTRACT:
An anchor drilling unit for use in rock bolting includes a rock drill with chuck traveling along a carriage, which drilling unit is improved by a special tool exchange device that can move parallel to the carriage and can also rotate relative to the rock drill. The tool exchange device includes a base support arranged parallel to the carriage and upper and lower carrier plates with releasable retaining elements for selectively retaining a drill rod, an anchor bar, and a cartridge tube used for injecting resin into the bore hole in a tunnel roof. The rod, bar, and tube can be aligned coaxially with the rock drill axis by turning the exchange device and each have lower ends adapted for cooperation with the chuck of the single rock drill. When setting an anchor, a hole is first bored using the drill rod and rock drill and the hole is filled with resin from the cartridge tube by injecting adhesive cartridges using wash water and finally an anchor bar is inserted through a support plate that has been placed against the roof of the tunnel. A nut is threaded on the end of the anchor rod and the support plate is tightened securely to the roof.
REFERENCES:
patent: 4158520 (1979-06-01), Prebensen
patent: 4229124 (1980-10-01), Frey et al.
patent: 4420277 (1983-12-01), Hibbard et al.
patent: 4473325 (1984-09-01), Beney et al.
patent: 4588037 (1986-05-01), Cambet
Ruttimann Hans-Rudolf
Spross Erhard
Straub Gunter
Corbin David H.
Eslinger Lewis H.
Maioli Jay H.
Sig Schweizerische Industrie-Fesellschaft
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