An experimental system and test method for tbm tunneling auxiliary rock breaking

Abstract

The invention discloses an experimental system for assisted TBM tunneling rock breaking. The experimental system comprises a slidable support platform, a support platform reserved hole, lockable rolling wheels, a support platform guide rail, a terhmal loading platform, a platform reserved hole, an electromagnetic wave system, an infrared measurement system, a cutter device, and a cutter counter-force frame. In addition, the invention also discloses an experimental method of assisted TBM tunneling rock breaking, thereby studying the influence on the physical and mechanical properties of rocks by microwave irradiation high temperature heating and liquid nitrogen cooling.

Description

technical field [0001] The invention belongs to the technical field of TBM (full-section tunnel boring machine) excavation, and in particular relates to an experimental system for assisting rock breaking by TBM excavation, and also relates to an experimental method for assisting rock breaking by TBM excavation. Background technique [0002] Traditional tunnel engineering adopts drilling and blasting method or TBM excavation method, but both have certain deficiencies, such as low precision and poor working conditions in drilling and blasting method, while TBM excavation method is difficult for extremely hard rock. [0003] The main reasons are: [0004] 1. The drilling and blasting method has a large disturbance to the surrounding rock, which is easy to cause damage to the surrounding rock, and has a series of disadvantages such as low construction accuracy and difficulty in supporting the surrounding rock. [0005] 2. When the TBM excavation method breaks hard rock with hig...

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Problems solved by technology

[0004] 1. The drilling and blasting method has a large disturbance to the surrounding rock, which is easy to cause damage to the surrounding rock, and has a series of disadvantages such as low construction accuracy and difficulty in supporting the surrounding rock.

[0005] 2. When the TBM tunneling method breaks hard rock with high compressive strength, it is extremely difficult to cut and break the cutting tool, the consumption of the cutting tool is large, and the rock breaking efficiency is low

However, on the one hand, the traditional heat source heating not only has the problems of low heat utilization rate and low safety, but on the other hand, due to the low thermal conductivity of rocks, the heat transfer speed is slow, resulting in low work efficiency.

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