Method and apparatus for excavating a tunnel or gallery face

Details Method and apparatus for excavating a tunnel or gallery face Method and apparatus for excavating a tunnel or gallery face

1983-01-27

1984-09-11

Purser, Ernest R.

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of hard material disintegrating machine

173 4, 173 7, 299 75, E21C 2724

Patent

active

044706359

ABSTRACT:
A method of excavating a tunnel face in which the cutting head is sunk into the face to form an initial penetration and is then moved laterally. The power consumption of the cutting head drive motor is measured, compared with the setpoint value and the attack increment is controlled accordingly. The arm carrying the cutting head is swung at a maximum swing moment but the swing moment is reduced when monitored distortion of machine parts shows that this distortion has exceeded a predetermined value.

REFERENCES:
patent: 2136921 (1938-11-01), Joy
patent: 2711880 (1955-06-01), McKenzie
patent: 3548570 (1970-12-01), Knott et al.
patent: 3734202 (1973-05-01), Gyongyosi

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