Shield tunneling machine

Details Shield tunneling machine Shield tunneling machine

1985-12-17

1987-04-07

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

With mine roof-supporting means

299 31, 405143, E21D 908

Patent

active

046554939

ABSTRACT:
A shield tunneling machine comprises a shield body provided with a tubular head portion and a tubular tail portion disposed behind the head portion. The head portion and tail portion are interconnected by a plurality of thrusting jacks for moving both portions to and away from each other. In the shield body are arranged a cutter head for excavating the face, a mechanism for rotating the cutter head and a plurality of position-maintaining mechanisms making the natural ground a reaction body to advance the shield body and having press bodies capable of projecting outward of the shield body. The machine, during the excavation has the head portion advanced relative to the tail portion by the thrusting jack and the tail portion next attracted to the head portion by the thrusting jack.

REFERENCES:
patent: 3630574 (1971-12-01), Cox et al.
patent: 3967463 (1976-07-01), Grandori
patent: 4095436 (1978-06-01), Heitkamp et al.
patent: 4398845 (1983-08-01), Stuckmann et al.
patent: 4406498 (1983-09-01), Akesaka
patent: 4420188 (1983-12-01), Robbins et al.
patent: 4508390 (1985-04-01), Bessol

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