Hydraulic-mechanical combined rock-breaking tbm device and rock-breaking method

Abstract

The invention discloses a hydraulic-mechanical combined rock-breaking TBM device. It includes a rotary drive, a propulsion cylinder, an outer frame, a hydraulic cylinder, a shoe on the outer frame and a TBM cutterhead structure; the TBM cutterhead structure is installed at the front end of the rotary drive and is located in front of the outer frame side; the outer frame is located outside the rotary drive; the upper shoe of the outer frame is located behind the outer frame and is connected with the outer frame through the propulsion cylinder; it is characterized in that: there is a mechanical The hob structure and the hydraulic cutting tool module are arranged circumferentially on the TBM cutter head structure; the mechanical hob structure and the hydraulic cutting tool module are arranged at intervals; the hydraulic cutting tool module is installed in the radial direction Between the two mechanical hob structures arranged at intervals. The invention has the advantages of reducing the wear of the nozzle, shortening the distance between the cutter and the rock wall, and improving the rock breaking efficiency. The invention also discloses a rock-breaking method of a hydraulic-mechanical combined rock-breaking TBM device.

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 hydraulic-mechanical combined rock-breaking TBM device. The invention also relates to a rock-breaking method of a hydraulic-mechanical combined rock-breaking TBM device. Background technique [0002] The traditional TBM uses a mechanical hob to break rock, and the TBM hob often has three states when breaking rock, namely, small penetration, proper penetration and excessive penetration. Under the condition of a certain hob spacing, if the penetration is too small, the cracks generated under the cutter head will expand to the free surface of the broken rock (hole face) and form triangular rock slag flakes, or the cracks formed by two adjacent hobs. The generated horizontal cracks cannot intersect, and the rock ridge between the hobs cannot be damaged by ...

AI Technical Summary

Problems solved by technology

[0005] However, if the above-mentioned first rock-breaking method is used to break rocks, the maximum force required to break rocks is relatively large, and the hob is easy to wear, so the rock-breaking efficiency is low;

[0006] Use the above-mentioned second rock-breaking method 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"; it is in the main structural form of traditional 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

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