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Microwave-assisted rock breaking TBM cutter head for hard rocks

A microwave-assisted, cutter head technology, applied in safety devices, mining equipment, earth-moving drilling, etc., can solve problems such as difficulty in ensuring tunnel construction period, increase equipment cost, tool wear, etc., and shorten construction period and project investment. , Increase the effect of rock breaking and increasing rock breaking rate

Pending Publication Date: 2019-05-17
CHINA RAILWAY TUNNEL GROUP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the statistics of engineering data in some superhard rock tunnel sections, if the tunnel excavation is less than 1 meter, the tool will have to be changed due to severe tool wear and chipping due to rock strength problems. Repeated TBM tool change operations are not only extremely Increased equipment usage costs, and it is difficult to guarantee the tunnel construction period

Method used

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  • Microwave-assisted rock breaking TBM cutter head for hard rocks
  • Microwave-assisted rock breaking TBM cutter head for hard rocks
  • Microwave-assisted rock breaking TBM cutter head for hard rocks

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Such as figure 1 As shown, a microwave-assisted rock-breaking TBM cutterhead for hard rock according to the present invention includes a cutterhead body 1, a microwave emitting device 2, a single-edged hob 3, a double-edged hob 4, and a water spray and dust removal port 5. 4 double-edged hobs No. S1-S8 are arranged in the center of the cutter body 1, and a total of 34 single-edged hobs S9-S42 are arranged on the panel position. The hobs are arranged symmetrically, and the rock-breaking trajectory of each hob blade No coincidence, the number of hob arrangements can be reasonably increased or decreased according to the design diameter of the equipment. The water spray and dust removal ports 5 are arranged along the circumferential direction of the cutter head, and the number of water spray and dust removal ports can be reasonably increas...

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Abstract

The invention discloses a microwave-assisted rock breaking TBM cutter head for hard rocks. The cutter head comprises a TBM cutter head body, wherein the TBM cutter head body mainly comprises a single-edge rock breaking hobbing cutter, a double-edge rock breaking hobbing cutter, a plurality of water injection dedusting openings and a plurality of microwave-assisted rock breaking emitters; the cutter head covers rock breaking paths in different tracks through the combination of the double-edge rock breaking hobbing cutter and the single-edge rock breaking hobbing cutter; a cutter head panel is provided with the water injection dedusting openings; the cutter head panel is provided with the microwave-assisted rock breaking emitters; each microwave-assisted rock breaking emitter comprises a microwave emitting disc, a wave guiding structure and a microwave emitting module. The cutter head has the advantages that a microwave emitting device is started in case of hard strata, rocks are rapidlyheated through microwave, mechanical properties of rocks, such as the point load strength, uniaxial compressive strength and tensile strength, are reduced, rock joint fissure assisted TBM hobbing cutter rock breaking is added, the penetration speed of disc cutters is improved, the rock breaking rate is improved, the thrust and torque of TBM equipment are reduced, abrasion of the hobbing cutters in hard rocks and cutter changing frequency are reduced, the construction period can be greatly reduced, and the construction investment can be reduced.

Description

technical field [0001] The invention relates to the field of TBM hard rock tunnel construction, in particular to a microwave-assisted TBM rock breaking cutterhead for hard rock and superhard rock. Background technique [0002] With the rapid development of underground space engineering, more and more tunnels are being planned and constructed, and TBM is being used more and more in hard rock tunnel excavation. However, in the process of hard rock tunnel excavation, due to rock The strength is hard, the joint development is poor, and the wear and damage to the tool are severe during the rock breaking process. According to the statistics of engineering data in some ultra-hard rock tunnel sections, if the tunnel excavation is less than 1 meter, the tool will have to be changed due to severe tool wear and chipping due to rock strength problems. Repeated TBM tool change operations are not only extremely The cost of equipment usage is increased, and it is difficult to guarantee th...

Claims

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Application Information

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IPC IPC(8): E21D9/087E21D9/00E21F5/04
Inventor 李宏波周建军王平豪孙振川张兵翟乾智王利明陈岗陶源冯俊琦
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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