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Water jet cutting hob with combined rock breaking and rock breaking method of water jet cutting hob

A hydraulic cutting and rock-breaking technology, which is applied in earthwork drilling, mining equipment, tunnels, etc., can solve the problems that the mechanical rock-breaking rate cannot be matched, and the rock-breaking efficiency cannot be greatly improved, so as to reduce functional complexity, reduce weight, Effect of reducing nozzle wear

Pending Publication Date: 2020-06-02
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

At present, the mechanical-hydraulic combined rock-breaking TBM is the most feasible form. However, due to the limitation of the current rock-cutting rate of hydraulic power, it cannot match the mechanical rock-breaking rate, so that the overall rock-breaking efficiency cannot be greatly improved.

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  • Water jet cutting hob with combined rock breaking and rock breaking method of water jet cutting hob
  • Water jet cutting hob with combined rock breaking and rock breaking method of water jet cutting hob
  • Water jet cutting hob with combined rock breaking and rock breaking method of water jet cutting hob

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Embodiment Construction

[0061] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation to the present invention, and are only examples. At the same time, the advantages of the present invention are clearer and easier to understand through the description.

[0062] Referring to the accompanying drawings, it can be seen that the hydraulic cutting hob combined with rock breaking is characterized in that it has a spoke structure; it includes a tool center axis 1, a high-pressure water injection hole 2, a high-pressure water jet channel 3, a protective rigid sleeve structure 4, and a high-pressure water jet. Jet nozzle 5, nozzle supporting annular belt frame 6;

[0063] The high-pressure water injection hole 2 is located in the center shaft 1 of the cutter and at the center of the center shaft 1 of the cutter; the center shaft of the cutter is the central bearing of the hydraulic cutting hob, and t...

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Abstract

The invention discloses a water jet cutting hob with combined rock breaking. The water jet cutting hob with combined rock breaking is of a spoke-type structure and comprises a cutter central axis, a high-pressure water injection hole, a high-pressure water jet channel and a nozzle-supporting annular belt-shaped frame; the high-pressure water injection hole is located in the cutter central axis; the high-pressure water jet channel and the cutter central axis are arranged vertically; one end of the high-pressure water jet channel communicates with the high-pressure water injection hole, and theother end of the high-pressure water jet channel is radially distributed along the nozzle-supporting annular belt-shaped frame and located on the nozzle-supporting annular belt-shaped frame. The waterjet cutting hob with combined rock breaking has the advantage of improving rock breaking efficiency. The invention further discloses a rock breaking method of the water jet cutting hob with combinedrock breaking.

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 cutting hob combined with rock breaking. The present invention also relates to the rock-breaking method combined with the rock-breaking hydraulic cutting hob. 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 c...

Claims

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Application Information

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IPC IPC(8): E21D9/11E21D9/10
CPCE21D9/1066E21D9/11
Inventor 卢景景徐福通周辉张传庆邱浩权杨凡杰
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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