Shaft-sinking apparatus with milling head and central worm conve

Details Shaft-sinking apparatus with milling head and central worm conve Shaft-sinking apparatus with milling head and central worm conve

1979-08-23

1981-06-23

Purser, Ernest R.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Stepper-type advance-causing means

175 94, 175102, 299 56, 299 61, E21D 103

Patent

active

042746752

ABSTRACT:
An apparatus for the sinking of a shaft in which a machine platform can be anchored against the wall of the incipient shaft and carries an orbiting tool for cutting away the floor of the shaft, thereby dumping the detritus into a pilot-bore hole continuously drilled by a pilot-bore unit. The latter has a head for advancing the pilot bore and is provided with a worm conveyor running centrally through the shaft to transfer the detritus to a bucket on a loading platform disposed above the main platforms and connected thereto for feed cylinders. The platforms have cylinder arrangements whereby they can be independently anchored to the vertical wall of the shaft.

REFERENCES:
patent: 1604896 (1926-10-01), Foltz
patent: 2250671 (1941-07-01), Joy
patent: 2798707 (1957-07-01), Kandle
patent: 3379264 (1968-04-01), Cox
patent: 3965995 (1976-06-01), Sugden

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