Method and system for performing attitude control of tunnel exca

Details Method and system for performing attitude control of tunnel exca Method and system for performing attitude control of tunnel exca

1977-04-27

1978-09-05

Purser, Ernest R.

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of hard material disintegrating machine

175 61, E21D 908

Patent

active

041114868

ABSTRACT:
Attitude controlling method of tunneling machine shield and system for performing the method, wherein a plurality of jacks installed at a tail end of the shield for propelling the same toward tunnel face ground are selectively driven when the shield deviates from intended tunneling direction. Such deviation detected is first indicated in an indicating and controlling unit and then the unit is operated to actuate an associated circuit connected to the respective jacks in accordance with the indicated deviation so that selective ones only of the jacks effective to correct the deviation will be driven.

REFERENCES:
patent: 3560753 (1971-02-01), Beug et al.
patent: 3857449 (1974-12-01), Kimura
patent: 3986568 (1976-10-01), Weiss

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