CN-121976812-A - Microwave-assisted shield/TBM cutter disc synchronous rock breaking device and control mode thereof

Abstract

The invention relates to the technical field of tunneling, in particular to a microwave-assisted shield/TBM cutterhead synchronous rock breaking device and a control mode thereof, wherein the device comprises the steps of acquiring hardness information of rock stratum encountered in the tunneling process of a shield/TBM in real time through a control system; the control system controls the microwave transmitting heads in the extending state to transmit microwaves, so that the microwave auxiliary rock breaking process can be selectively started according to different rock layer hardness by arranging a plurality of independently controllable telescopic microwave transmitting heads on the cutter head body, thereby improving pertinence and efficiency of microwave heating, reducing unnecessary energy consumption, reducing hob abrasion and improving integral efficiency and economy of shield/TBM tunneling operation.

Inventors

• YANG LUNLEI
• Xiao Liaoyuan
• Zeng Haolan
• LI DONGSHENG
• XIA YIMIN
• ZHENG SHUAICHAO
• GUO QIANG
• YANG MEI
• LI YAN
• LIN LAIKUANG
• KONG LINGZHENG

Assignees

• 中南大学
• 中铁十四局集团装备有限公司
• 中铁十四局集团有限公司

Dates

Publication Date

20260505

Application Date

20260127

Claims (7)

1. 1. The control mode of the microwave-assisted shield/TBM cutterhead synchronous rock breaking device is characterized by comprising the following steps of: Acquiring hardness information of rock stratum encountered in TBM tunneling process in real time through a control system; According to the judging result of the rock stratum hardness, the control system independently controls the telescopic mechanisms of the microwave transmitting heads to carry out telescopic operation; And the control system controls the microwave transmitting head in the extending state to transmit microwaves.
2. 2. The control method of the microwave-assisted shield/TBM cutterhead synchronous rock breaking device according to claim 1, wherein the control system independently controls the telescopic mechanisms of the microwave emission heads to extend and retract according to the judging result of the rock layer hardness, the steps further comprising: The control system can dynamically adjust the microwave output power of the microwave transmitting head in an extending state according to the hardness change of the rock stratum.
3. 3. The control method of the microwave-assisted shield/TBM cutterhead synchronous rock breaking device according to claim 2, wherein the control system independently controls the telescopic mechanisms of the microwave emission heads to extend and retract according to the judging result of the rock layer hardness, the steps further comprising: the number of the microwave transmitting heads is five, and the five microwave transmitting heads all adopt separate independent control structures.
4. 4. The control method of the microwave-assisted shield/TBM cutterhead synchronous rock breaking device according to claim 3, wherein the control system independently controls the telescopic mechanisms of the microwave emission heads to extend and retract according to the judging result of the rock layer hardness, the steps further comprising: The telescopic mechanism is a hydraulic telescopic mechanism, and the telescopic direction is arranged along the axial direction of the cutter head body.
5. 5. The method for controlling a microwave-assisted shield/TBM cutterhead synchronous rock breaking device according to claim 3, wherein the control system controls the microwave emitting head in an extended state to emit microwaves, and the method further comprises: the microwave transmitting head is arranged in front of the hob rock breaking track.
6. 6. The control mode of the microwave-assisted shield/TBM cutterhead synchronous rock breaking device is suitable for the microwave-assisted shield/TBM cutterhead synchronous rock breaking device according to any one of claims 1-6, and is characterized by comprising a cutterhead body, a hob and a microwave transmitting device, wherein the hob is arranged on the cutterhead body, and the microwave transmitting device is arranged on the cutterhead body.
7. 7. The microwave-assisted shield/TBM cutterhead synchronous rock breaking device according to claim 6, wherein, The microwave transmitting device comprises a microwave transmitting tube fixing support, a microwave transmitting tube, a microwave transmitting head and a telescopic mechanism, wherein the microwave transmitting tube is assembled on the cutterhead body through the microwave transmitting tube fixing support, and the microwave transmitting head is installed on the cutterhead body through the telescopic mechanism.

Description

Microwave-assisted shield/TBM cutter disc synchronous rock breaking device and control mode thereof Technical Field The invention relates to the technical field of tunneling, in particular to a microwave-assisted shield/TBM cutterhead synchronous rock breaking device and a control mode thereof. Background The full-face tunnel boring machine (shield/TBM) is widely applied to underground engineering construction such as railway, highway, water conservancy and urban rail transit due to the advantages of high construction safety, good forming quality, high construction efficiency and the like. However, in the actual tunneling process, the shield/TBM often needs to penetrate rock layers with different hardness, especially under geological conditions of uneven hardness or alternate distribution of hard rock and extremely hard rock, the traditional single mechanical rock breaking mode of the hob has the defects that under the condition of hard rock or extremely hard rock, the hob penetration difficulty is high, the abrasion is serious, the thrust and torque are increased, the tool changing is frequent, the construction cost is high, if the high-energy consumption auxiliary rock breaking mode designed for the working condition of the hard rock is still adopted in the softer rock layer, the energy waste is easily caused, the integral tunneling efficiency is reduced, the traditional microwave auxiliary rock breaking shield/TBM cutterhead adopts a microwave emission structure which is fixed or is opened integrally at the same time, and the capability of carrying out differential and fine control on different hardness of the rock layers is lacked, so that the rock breaking effect and the energy utilization rate are difficult to be considered under the condition of complex stratum. Therefore, a TBM cutterhead structure capable of realizing the starting and stopping of a microwave transmitting device according to the hardness change of a rock stratum, adjustable in quantity and optional in position and synchronously carrying out the hob rock breaking process is needed, so that the pertinence and the economy of microwave-assisted rock breaking are improved. Disclosure of Invention The invention aims to provide a synchronous rock breaking device of a microwave-assisted shield/TBM cutter head and a control mode thereof, and solves the problems that the existing microwave-assisted rock breaking shield/TBM cutter head adopts a fixed or integral microwave emission structure which is opened simultaneously, lacks the capability of carrying out differentiation and fine control on different positions and different rock layer hardness, and is difficult to consider the rock breaking effect and the energy utilization rate under the complex stratum condition. In order to achieve the purpose, the invention provides a method for controlling the amount of a synchronous rock breaking device of a microwave-assisted shield/TBM cutter head, which comprises the following steps: acquiring hardness information of rock stratum encountered in the tunneling process of the shield/TBM in real time through a control system; According to the judging result of the rock stratum hardness, the control system independently controls the telescopic mechanisms of the microwave transmitting heads to carry out telescopic operation; And the control system controls the microwave transmitting head in the extending state to transmit microwaves. Wherein, according to the judgement result of stratum hardness, the telescopic machanism of each microwave emission head of independent control of control system stretches out and draws back, the step still includes: The control system can dynamically adjust the microwave output power of the microwave transmitting head in an extending state according to the hardness change of the rock stratum. Wherein, according to the judgement result of stratum hardness, the telescopic machanism of each microwave emission head of independent control of control system stretches out and draws back, the step still includes: the number of the microwave transmitting heads is five, and the five microwave transmitting heads all adopt separate independent control structures. Wherein, according to the judgement result of stratum hardness, the telescopic machanism of each microwave emission head of independent control of control system stretches out and draws back, the step still includes: The telescopic mechanism is a hydraulic telescopic mechanism, and the telescopic direction is arranged along the axial direction of the cutter head body. Wherein, the control system controls the microwave transmitting head in the extending state to transmit microwaves, and the steps further comprise: the microwave transmitting head is arranged in front of the hob rock breaking track. The microwave-assisted shield/TBM cutterhead synchronous rock breaking device is suitable for a control mode of the microwave-assisted shield/TBM cutterhead synchronous rock breaking