Tunnel boring machine and cutterhead assisting rock breaking via high-energy particle impact

Abstract

The invention discloses a tunnel boring machine and a cutterhead assisting rock breaking via high-energy particle impact. The cutterhead assisting rock breaking via high-energy particle impact comprises a hob and a plurality of plasma electromagnetic injection systems. Each plasma electromagnetic injection system comprises a particle injection opening, a particle storage device used for storing particles, a plasma gas propulsion assembly for providing injection power for the particles through gas detonation, and an electromagnetic propulsion assembly for providing acceleration acting force for the particles. According to the cutterhead assisting rock breaking through high-energy particle impact, the speed that a single particle enters a rock in an impact mode is increased, the depth that the single particle can enter the rock in an impact mode is increased, in addition, in a same time, the number of particles which can be emitted by a single plasma electromagnetic injection system is increased, the damage force of the particles to the rock is increased, an ideal damage effect on the rock can be achieved, and the rock breaking efficiency and the rock breaking quality are improved.

Description

technical field [0001] The present invention relates to the technical field of roadheading machines, and more specifically, to a cutter head for assisting rock-breaking by high-energy particle impact. In addition, the present invention also relates to a tunnel boring machine including the above-mentioned cutter head for assisting rock-breaking by impacting high-energy particles. Background technique [0002] In the process of rock tunnel excavation, full-section hard rock roadheader is an important tunnel construction engineering equipment, which is widely used in railway construction, highway construction, hydropower and hydropower, mining and municipal engineering and other fields. Full-section hard rock roadheader During the working process, the hob installed on the cutter head squeezes and breaks the rock under the action of a large thrust to achieve the purpose of tunnel excavation. For rocks with a hardness less than 100 MPa, the rock-breaking efficiency of the hard-ro...

AI Technical Summary

Problems solved by technology

For rocks with a hardness less than 100MPa, the rock-breaking efficiency of the hard-rock roadheader is high, but when faced with high-hardness rock or extremely hard rock, its rock-breaking efficiency will drop significantly. At the same time, the wear of the hob is serious, and the construction cost increases

[0003] In the prior art, the high-energy particle impact-assisted rock-breaking roadheader includes a high-pressure pump, a booster, an accumulator, and a particle generator, and the high-pressure pump accelerates the particles. Since the fluid medium in the high-pressure pump flows Affected by the fluid properties of the medium, the maximum flow velocity of the fluid can only reach below 300m / s, or even 100m / s, which severely limits the velocity of the particles and limits the kinetic energy of the particles when they impact the rock. When the rock is broken, the rock-breaking effect and efficiency are affected

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