Rock excavating arched tunnel forming machine

Details Rock excavating arched tunnel forming machine Rock excavating arched tunnel forming machine

1975-02-13

1976-09-07

Purser, Ernest R.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Stepper-type advance-causing means

299 71, E21C 2900

Patent

active

039791513

ABSTRACT:
A rock excavating machine for forming an arch type underground roadway includes a base carrying a forwardly extending cutter carrying arm having a cutter for cutting rock adjacent to the roadway floor and an upwardly extending cutter carrying arm having a cutter for cutting rock adjacent to the raodway roof. The forwardly extending cutter is mounted on an arm which swings around a vertical axis, and which is elevatable along the vertical axis. The upwardly extending cutter carrying arm swings around a horizontal axis. Roof support jacks and beams are mounted on the base rearwardly of the cutters. Lateral jacks anchor the machine in the tunnel during cutting.

REFERENCES:
patent: 1978366 (1934-10-01), Levin
patent: 2020003 (1935-11-01), Sloane
patent: 3290095 (1966-12-01), Bredthauer
patent: 3442554 (1969-05-01), Paul
patent: 3446535 (1969-05-01), Lauber
patent: 3647263 (1972-03-01), Lauber et al.
patent: 3695717 (1972-10-01), Birrer

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