Shield tunnel boring machine

Details Shield tunnel boring machine Shield tunnel boring machine

1984-11-29

1986-08-26

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

With mine roof-supporting means

299 11, 299 56, 175 62, F21D 908

Patent

active

046078894

ABSTRACT:
A shield tunnel boring machine having at its boring head a pressure-resisting mud kneading chamber defined by a bulkhead, wherein the bulkhead is divided into outer peripheral and central bulkhead parts. The outer peripheral bulkhead part is fixed to the inner periphery of a cylindrical shield. The central bulkhead part is made rotatable in association with a head-positioned rotary cutter as driven by a main motor. The sealing means required for the bulkhead is limited to seal one for a gap between the fixed outer peripheral bulkhead part and the rotatable central bulkhead part and the number of necessary related parts can be remarkably reduced.

REFERENCES:
patent: 3653716 (1972-04-01), Hattrup
patent: 3830545 (1974-08-01), Snyden
patent: 4298230 (1981-11-01), Krabbe
patent: 4406498 (1983-09-01), Akesaka

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