High-pressure water jet edge cutter and combined rock breaking and escaping TBM cutterhead and method thereof

Abstract

The invention discloses a high-pressure water jet edge cutter which comprises an edge cutter mechanical structure, an edge cutter high-pressure water jet pipeline and an edge cutter high-pressure water jet nozzle. The edge cutter high-pressure water jet pipeline is located in the edge cutter mechanical structure. The edge cutter high-pressure water jet nozzle is embedded in the edge cutter mechanical structure and communicates with the edge cutter high-pressure water jet pipeline. The high-pressure water jet edge cutter has the advantages of realizing rock breaking through high-pressure waterjet and solving the problem that a TBM gets stuck. The invention further discloses a hydraulic-mechanical combined rock breaking and escaping TBM cutterhead. The invention further discloses a hydraulic-mechanical combined rock breaking and escaping method.

Description

technical field [0001] The invention relates to the technical field of tunnels and underground engineering, in particular to the field of TBM tunnel construction under complex geological conditions, more specifically it is a high-pressure water jet edge cutter. The present invention also relates to a combined rock-breaking and trap-breaking TBM cutterhead, that is, a hydraulic-mechanical combined rock-breaking and trap-breaking TBM cutterhead. The present invention also relates to a combined rock-breaking and trap-breaking method for TBM cutter head relief, i.e. a hydraulic-mechanical combined rock-breaking and trap-breaking method. Background technique [0002] Traditional TBM adopts mechanical hobs to break rock, and TBM hobs often have three states when breaking rocks, that is, small penetration, proper penetration and excessive penetration. Under a certain hob spacing condition, if the penetration is too small, the cracks generated under the cutter head will expand to t...

AI Technical Summary

Problems solved by technology

[0005] But adopt above-mentioned first kind of rock-breaking mode to carry out rock-breaking, the required maximum power of destroying rock is bigger, and hob is easy to wear and tear, and rock-breaking efficiency is lower;

[0006] The above-mentioned second rock-breaking method is used to break rocks. For example, the application number is: 201310188881.X, and the patent name is "Arrangement Method and Structure of High-Pressure Water Jet in TBM Cutterhead"; Basically, a number of high-pressure water nozzles are randomly arranged in the blank positions of the TBM cutter head, which can improve the rock-breaking efficiency of the TBM, reduce the temperature of the cutter head, and prevent dust and cool the environment; however, because it needs to be specially installed on the TBM cutter head The opening of the water knife has a complex structure, and the random cooling of the mechanical hob is not targeted. Because it is in the normal open state, it is easy to cause waste of water resources, high energy consumption for rock breaking, and the expected effect cannot be achieved.

[0007] For example, the application number is CN105736006A, and the patent name is "High Pressure Water Jet Full-Section Rock Tunneling Machine Cutter Design Method". The inventors Huo Junzhou and Zhu Dong changed the shape of the traditional circular cutter head and adopted two cross-shaped spoke layouts. , through the impact of water jets on the four spokes and the rotary extrusion of the cutter to break rocks, which reduces the energy consumption of rock breaking; but it has a large change to the traditional TBM cutter head, and the cost is high, which is not conducive to realization and application

[0008] In addition, during the rock-breaking process of the TBM tunnel boring machine, due to the influence of ground stress and rock strength characteristics, the phenomenon of TBM cutterhead jamming may occur, which seriously affects the tunneling efficiency of the TBM and causes major equipment damage and property loss.

Images