Vibrator and pushing apparatus for driving metal pins in rock fa

Details Vibrator and pushing apparatus for driving metal pins in rock fa Vibrator and pushing apparatus for driving metal pins in rock fa

1973-04-04

1977-07-05

Purser, Ernest R.

Tool driving or impacting

With work engaging means supporting drive

Structure extends between opposed points

61 45B, 173 49, 173160, 175 19, 227130, E21D 2000

Patent

active

040334198

ABSTRACT:
Method and apparatus for driving metal pins into a rock face in an underground mine to strengthen rock surfaces such as stratified overburden, or rock ribs, against failure. A cylinder containing a pin with its head resting on a driven member, and having lateral support within the apparatus, is positioned against the rock face to be pinned. The pin is then driven into the rock by a combination of pressure and vibration at sonic frequencies applied longitudinally to the pin to thus strengthen the rock face against collapse.

REFERENCES:
patent: 3008528 (1961-11-01), Berthet et al.
patent: 3431988 (1969-03-01), Bodine
patent: 3595325 (1971-07-01), Libby et al.
patent: 3597929 (1971-08-01), Bodine
patent: 3721094 (1973-03-01), Elders et al.
patent: 3819101 (1974-06-01), Elders et al.

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