01-04-2021 дата публикации
Номер: US20210095565A1
Принадлежит:
A rapid construction method of pipe jacking for underground rescue tunnel with large section is disclosed. The present invention realizes rock breaking through the cutting head of a roadheader cutting unit, and pushes pipe jacking forward through a pushing thruster. During the process, a protecting bush fixedly connected with a stretchable part is adopted for circumferential support; and since the cutting head and the protecting bush occupy the rock breaking space, and the pushing thruster pushes pipe jacking forward to push the coal rock in the annular space to the circumferential direction, the effect of moving forward without slag discharge can be achieved. The present invention can establish a rescue tunnel quickly and effectively, which saves rescue time and greatly reduces the threat to the life safety of trapped people. The present invention can establish a fast and safe underground rescue tunnel with large section for the rescue of people. 119{'b': 1', '1', '1', '1', '2', '1', '3', '1', '4', '1', '5', '1', '6', '1', '7', '1', '6', '1', '1', '5', '1', '6', '1', '4', '1', '5', '1', '7', '1', '3', '1', '7', '1', '1', '1', '3', '1', '1', '1', '1', '1', '2', '1', '3, 'the roadheader cutting unit () comprises a cutting head (-), a protecting bush (-), a stretchable part (-), a cutting reducer (-), an electric motor (-), a frame body (-) and couplings (-); the frame body (-) is fixed on the tail end of the roadheader cutting unit (), and the electric motor (-) is fixed in the frame body (-) and used to provide power; an input shaft of the cutting reducer (-) is connected with the electric motor (-) through the coupling (-), and an output shaft is connected with one end of the stretchable part (-) through the coupling (-); the cutting head (-) is fixed on the other end of the stretchable part (-) to realize the stretch and pitch of the cutting head (-); the cutting head (-) has a tapered structure; the protecting bush (-) is fixed on the periphery of the stretchable ...
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