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A leading-guided roadheader cutter head for extremely hard rock excavation

A guided, extremely hard technology, applied in mining equipment, tunnels, earthwork drilling and mining, etc., can solve problems such as low efficiency, fast consumption of hobs, and difficult rock breaking, so as to reduce engineering investment, save costs, and reduce broken rocks. Effect of Rock Difficulty

Active Publication Date: 2020-10-20
STATE KEY LAB OF SHIELD & TUNNELING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the present invention is to address the deficiencies of the prior art, to provide a leading-guided roadheader cutter head for extremely hard rock excavation that can improve the rock-breaking efficiency, shorten the construction period, and reduce the wear of the cutter head. It solves the disadvantages of fast consumption of traditional hobs, frequent replacement, difficulty in breaking rocks and low efficiency

Method used

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  • A leading-guided roadheader cutter head for extremely hard rock excavation
  • A leading-guided roadheader cutter head for extremely hard rock excavation
  • A leading-guided roadheader cutter head for extremely hard rock excavation

Examples

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Embodiment 1

[0028] Such as Figure 1-4 As shown, a leading-guided roadheader cutterhead for excavation of extremely hard rock includes a conical small cutterhead 4 for breaking rock in advance and a small cutterhead for subsequent expansion and rock breaking arranged on the outside of the small cutterhead 4 . A large planar cutterhead 1 is provided with a plurality of first hobs 3 and second hobs 5 respectively on the small cutterhead 4 and the large cutterhead 1, and the blades of the first hobs 3 and second hobs 5 break rock The trajectory lines of the first hob 3 and the second hob 5 do not overlap, and the rock-breaking trajectory lines of the blades of the first hob 3 and the second hob 5 cover the entire rock face. Figure 5 shown.

[0029] The taper angle of the small cutter head 4 β ≤ arctan( f + µ ),in f Be the friction coefficient of small cutterhead 4 and hard rock contact, µ is the correction coefficient set according to the rock strength. The harder the rock strength, ...

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Abstract

The invention discloses a pilot type heading machine cutterhead for extra-hard rock excavation. The pilot type heading machine cutterhead for extra-hard rock excavation comprises a conical small cutterhead for advanced rock breaking and a planar large cutterhead which is arranged on the outer side of the small cutterhead and used for subsequent expanding excavation and rock breaking, the small cutterhead and the large cutterhead are provided with a plurality of first hobbing cutters and second hobbing cutters respectively, and the small cutterhead and the large cutterhead are further providedwith water spraying dust removing ports separately. According to the pilot type heading machine cutterhead for extra-hard rock excavation, a traditional rock breaking manner is changed, surface contact is changed into point contact, the rock breaking efficiency is overall improved, the construction period can be greatly shortened, cutterhead wear is reduced, and the problems that for traditional hobbing cutters, consumption is fast, frequent replacement is needed, the rock breaking difficulty is large, and the efficiency is low are solved.

Description

technical field [0001] The invention relates to the technical field of rock-breaking equipment components, in particular to a leading-guided roadheader cutter head for extremely hard rock excavation. Background technique [0002] In the field of tunnel construction, whether the design of the cutter head of the roadheader is reasonable or not directly affects the efficiency and success of the project excavation. The surface is squeezed, and the hob blade cuts into the rock. During the rotation of the cutter head, the rock is broken by the combined action of thrust and torque. The specific crushing process is that in the complete and dense rock, the blade cuts into the rock mass under the action of thrust to form cut marks. With the rotation of the cutter head, the hob rolls, and the rock cut into the rock mass is first broken into powder, forming a crushing zone within the range of the top of the blade. The blade penetrates into the rock and produces many micro-cracks at th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/10
CPCE21D9/1006
Inventor 孙振川李宏波周建军张兵周晓泽韩伟锋陈瑞祥翟乾智潘东江杨延栋王利明赵海雷王明胜冯欢欢杨振兴王发民
Owner STATE KEY LAB OF SHIELD & TUNNELING TECH
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