Method for designing Y-shaped support shoe structures of full-face rock tunnel boring machines

Abstract

The invention belongs to the field of boring technologies for full-face rock tunnel boring machines, relates to a tunnel rock boring machine, and particularly relates to a method for designing Y-shaped support shoe structures of full-face rock tunnel boring machines. The method includes analyzing instability geological characteristics; primarily selecting included angles between first oblique support shoes and second oblique support shoes of right half portions of Y-shaped support shoes according to the geological characteristics; analyzing the stability of the right half portions by the aid of software ANSYS, judging whether the right half portions are stable or not and adjusting the right half portions until the right half portions are stable if the right half portions are not stable; determining left half portion structures and forming the Y-shaped support shoe structures. The method has the advantages that stable support effects can be realized under instable geological conditions, the probability of rock burst and collapse of surrounding rock at support shoe positions in rock burst regions and surrounding rock broken strata can be effectively reduced, and the adaptability and the boring efficiency of equipment of the TBM (tunnel boring machines) in the rock burst regions and the surrounding rock broke strata can be obviously improved.

Description

technical field [0001] The invention belongs to the technical field of full-section rock excavation machines, and relates to a tunnel rock excavation machine, in particular to a structure design method for a Y-shaped support shoe of a full-section rock excavation machine. Background technique [0002] Full-face rock boring machine is a large-scale special engineering machine for tunneling, and it is used in some geologically complex tunnel projects. The support shoe is used as a fixed part of the full-face rock boring machine. The thrust and torque reaction are transmitted to the cave wall, and are evenly supported on the cave wall by means of spherical hinges to avoid damage to the cave wall caused by concentrated loads. The support form of the open hard rock roadheader is divided into horizontal support and X-shaped support. . However, under unstable geological conditions, due to the poor cementation performance of the rock mass, broken surrounding rocks, and short self-...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of the prior art, the present invention invents a structural design method for the Y-shaped support shoe of a full-face rock boring machine, which solves the problem that the horizontal support is under unstable geological conditions, and the contact area is insufficient, so that it cannot provide sufficient support force, which eventually leads to The problem of rock fragmentation

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