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High-pressure water punching freezing expansion rock breaking TBM cutter head and using method thereof

A high-pressure water and high-pressure water jet technology, which is applied in earth-moving drilling, mining equipment, tunnels, etc., can solve the problems of limited, limited, and internal structure damage in the improvement of driving efficiency, so as to reduce rock-breaking force, improve efficiency, reduce The effect of rock breaking energy consumption

Pending Publication Date: 2021-11-09
STATE KEY LAB OF SHIELD & TUNNELING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the existing water-jet-assisted rock-breaking design often concentrates on one point or a line of rock damage, the damage to its internal structure is very limited, and the improvement of tunneling efficiency is also limited.

Method used

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  • High-pressure water punching freezing expansion rock breaking TBM cutter head and using method thereof
  • High-pressure water punching freezing expansion rock breaking TBM cutter head and using method thereof
  • High-pressure water punching freezing expansion rock breaking TBM cutter head and using method thereof

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Embodiment Construction

[0028] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that "front", "rear", "upper", "lower", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is constructed and operated in a specific orientation, It is only for the convenience of describing the technical solution, but does not indicate that the referred device or element must have a specific orientation, so it should not be construed as a limitation of the present invention.

[0029] It should also be noted that terms such as "installation", "connection", ...

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Abstract

The invention discloses a high-pressure water punching freezing expansion rock breaking TBM cutter head. The high-pressure water punching freezing expansion rock breaking TBM cutter head comprises a cutter head body, an edge hob, high-pressure water jet nozzles and a liquid nitrogen nozzle, wherein a compressed air nozzle is installed in an opening formed in the cutter head body and is in transmission connection with a driving device inside the cutter head body; the high-pressure water jet nozzles are arranged in a plurality of circles in a circumferential array mode by taking the central axis of the cutter head body as the axis, and are radially distributed on the end surface of the tunneling direction of the cutter head body from inside to outside, and the high-pressure water jet nozzles are in transmission connection with the driving device inside the cutter head body; and the liquid nitrogen nozzle is installed in an opening formed in the cutter head body and is in transmission connection with the driving device inside the cutter head body. According to the high-pressure water punching freezing expansion rock breaking TBM cutter head, the internal structure of hard rock is effectively damaged in advance in a liquid freezing volume expansion mode, then rock breaking treatment is carried out, so that the rock breaking force during hob rock breaking can be effectively reduced, the rock breaking efficiency is improved, and the rock breaking energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of TBM cutterheads, in particular to a high-pressure water punching, freezing and expansion rock-breaking TBM cutterhead and a method for using the same. Background technique [0002] Rock Tunnel Boring Machine (TBM) is a special equipment used for tunnel excavation in rock formations, mainly using the hob on the rotating cutter head to squeeze and shear rock. With the development of rail transit, the demand for TBM in tunnel and underground engineering is getting higher and higher. TBM often encounters hard rock with a compressive strength exceeding 200MPa during its work. Extremely hard rocks are mostly igneous rocks, which are formed by the condensation of magma deep underground. When they are formed, they are subjected to high pressure inside the crust, making their internal structure tight and their mechanical properties good. In the face of hard rock conditions, the rock-breaking ability of the tradit...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D9/087E21D9/10
CPCE21D9/001E21D9/087E21D9/1066
Inventor 郭璐向香彩曾桂英张旭辉韩伟锋罗星臣夏毅敏罗南川
Owner STATE KEY LAB OF SHIELD & TUNNELING TECH
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