Dynamic Simulation and Thermal Analysis of Rock Breaking Force on Disc Cutter of Tunnel Boring Machine

Rock tunnel boring machine is one of the main machineries and equipments for underground engineering, and the failure of tool systems is its main failure form. Rock hob test-bed is the only testing equipment for tool failure and wear. In this paper, the breaking rock by the double disc cutter is simulated and four kinds of rocks are selected to test the influece of rock characteristics and spacing between two disc cutters on the rock breaking by the double disc cutter test-bed. The results show that there is different optimal spacing between two disc cutters for different rock; the optimal spacing is inversely proportional to the hardness of the rocks; the maximum stress appears the boundary between the disc cutter and rock.

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Numerical Simulation of Rock-Breaking Process by Disc Cutter in Tunnel Boring Machine

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.487.513 ◽

2014 ◽

Vol 487 ◽

pp. 513-516 ◽

Cited By ~ 6

Author(s):

Yu Zhang ◽

Xing Wen Wang ◽

Hui Fang Liu

Keyword(s):

Working Life ◽

Tunnel Boring Machine ◽

Dynamic Contact ◽

Negative Influence ◽

Rock Breaking ◽

Disc Cutter ◽

Element Analysis ◽

Tunnel Boring ◽

Stress Load ◽

Rule Dynamics

The force load research of disc cutter can be used in the design of disc cutter, in order to improve the working life, determine when to change another cutter. Based on the working platform of ABAQUS finite element analysis module, single disc cutter rock-breaking of the simulation model is established, and according to the theory of rocks plastic rule, dynamics analysis and dynamic simulation are done when the cutter is in rock-breaking process by which, the added force can be got when the disc cutter and rocks contact each other in different wear conditions of contact force in the process of the dynamic contact each other. The results show that with the cutter damage increasing, the added force is increased and cutters maximum instantaneous stress load is 1.5 ~ 2.5 times than the average stress load, which has a negative influence on working efficiency. To have a clear understand of cutters design and working life and when to change another cutter in working time, the results also offer an engineering parameters for researching the load state of TBM tunneling.

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Using a high-pressure water jet-assisted tunnel boring machine to break rock

Advances in Mechanical Engineering ◽

10.1177/1687814020962290 ◽

2020 ◽

Vol 12 (10) ◽

pp. 168781402096229

Author(s):

Jinliang Zhang ◽

Yongchang Li ◽

Yuansheng Zhang ◽

Fengwei Yang ◽

Chao Liang ◽

...

Keyword(s):

High Pressure ◽

Tunnel Boring Machine ◽

Rock Breaking ◽

Water Jet ◽

Water Diversion ◽

Disc Cutter ◽

Tunnel Boring ◽

Water Jets ◽

Pressure Water ◽

High Pressure Water Jet

The concept of tunnel boring machine (TBM) disc cutter rock breaking coupled with high-pressure water jets has been proposed to overcome the difficulties that occur when TBMs encounter extremely hard rocks. Thus, to meet actual engineering requirements for the TBM construction of tunnels as part of the Wan’anxi water diversion project in Longyan City (Fujian Province, China), experiments were conducted on high-pressure water jet-assisted TBM disc cutter rock breaking. By varying kerf depth and width under different water jet parameters and performing disc cutter rock breaking tests on rock surfaces with no kerf, single kerf, and double kerfs, the effects of different kerf depths on the disc cutter rock breaking process, load, and efficiency were examined. The test results showed that high-pressure water jets can generate the regular kerfs required for the coupled disc cutter rock breaking of granite. Employing the coupled rock breaking method also resulted in a decrease in specific energy and an approximately 40% decrease in the normal force of the disc cutter, thereby significantly improving rock breaking efficiency. These results provide key technical parameters for the design and manufacture of high-pressure water jet-assisted rock-breaking TBMs and serves as a reference for similar processes.

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Numerical Simulation of Rock Breaking by Disc Cutter of Tunnel Boring Machine

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.638-640.888 ◽

2014 ◽

Vol 638-640 ◽

pp. 888-893

Author(s):

Qi Xing Wu ◽

Guang Feng An ◽

Xiao Wen Zhou ◽

Lin Chen

Keyword(s):

Finite Element ◽

Numerical Technique ◽

Nonlinear Dynamic Analysis ◽

Tunnel Boring Machine ◽

Element Model ◽

Rock Breaking ◽

Elastic Behavior ◽

Disc Cutter ◽

Three Dimension ◽

Tunnel Boring

By using the explicit nonlinear dynamic analysis program of LS-DYNA, three-dimension finite element model of rock breaking by disc cutter of tunnel boring machine is established, in which elastic material is adopted to describe the elastic behavior of cutter ring and Holmguist Johnson Concrete (HJC) model is adopted to describe the brittle behavior of rock. With the finite element method, the process of rock breaking by disc cutter is simulated, and then the movement characteristics, forces of disc cutter and rock fragmentation mechanism are analyzed. The results indicate that the numerical technique can contribute to gaining an understanding of rock breaking mechanism by disc cutter and improving the design of disc cutter parameters.

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Research on Breaking Energy Mechanism of Tunnel Boring Machine Disc Cutter Rock with CSM Model

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.651-653.988 ◽

2014 ◽

Vol 651-653 ◽

pp. 988-991 ◽

Cited By ~ 1

Author(s):

Nan Zhao ◽

Li Wei Song

Keyword(s):

Energy Efficiency ◽

Energy Transfer ◽

Rock Mass ◽

Tunnel Boring Machine ◽

Rock Breaking ◽

Energy Output ◽

Disc Cutter ◽

Efficiency Ratio ◽

Tunnel Boring ◽

Cutter Spacing

Full face rock tunnel boring machine in construction process, disc cutter put pressure on rock breaking, actually belongs to the process of energy transfer, from the point of view of energy analysis the energy transfer rules in the process of disc cutter rock breaking, based on CSM force prediction model, analysis disc cutter energy input and rock mass energy output efficiency ratio, for excavation with minimum energy efficiency. Taking S-536 Hong Kong water tunnel TBM as an example, When the penetration is 10mm, based on the energy efficiency ratio the optimal disc cutter spacing should be less than 70mm, than the actual average disc cutter spacing is small 2mm, rock mass as a reference the disc cutter rock breaking efficiency mechanism provides certain reference value for the cutter layout.

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WInBot: A Disc Cutter Wear Inspection Robot for a Tunnel Boring Machine

2019 IEEE 15th International Conference on Automation Science and Engineering (CASE) ◽

10.1109/coase.2019.8843181 ◽

2019 ◽

Author(s):

Yudai Yamada ◽

Rui Fukui ◽

Shin'ichi Warisawa ◽

Eiichi Morioka ◽

Masaaki Uetake ◽

...

Keyword(s):

Tunnel Boring Machine ◽

Disc Cutter ◽

Inspection Robot ◽

Tunnel Boring ◽

Cutter Wear ◽

Disc Cutter Wear

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Acoustic Emission Characteristics During Rock Fragmentation Processes Induced by Disc Cutter under Different Water Content Conditions

Applied Sciences ◽

10.3390/app9010194 ◽

2019 ◽

Vol 9 (1) ◽

pp. 194 ◽

Cited By ~ 3

Author(s):

Qibin Lin ◽

Ping Cao ◽

Rihong Cao ◽

Xiang Fan

Keyword(s):

Acoustic Emission ◽

Water Content ◽

Specific Energy ◽

Tunnel Boring Machine ◽

Rock Breaking ◽

Rock Fragmentation ◽

Disc Cutter ◽

Physical Acoustics ◽

Indentation Force ◽

Penetration Force

Based on a properly modified testing platform and Physical Acoustics Corporation (PAC) Micro-II acoustic emission (AE) system, a series of sequential indentation tests on granite samples with five different water contents was conducted to investigate the effect of the water content on the rock fragmentation process induced by a tunnel boring machine (TBM) disc cutter. During these tests, the effects of the water content on the characteristics of the peak penetration force, AE events, consumed energy, rock chip volume, and specific energy were analyzed. The results showed that the AE events were associated with the whole second indentation process of the granite. Under conditions with the same water content, the peak penetration forces and the consumed energy were smaller than those in the first indentation force. Additionally, subsequent chips were formed more frequently than the first indentation chips. The specific energy was lower, which meant that the rock breaking efficiency was higher. With the increase in the water content, the acoustic emission events reduced. The peak penetration force and consumed energy decreased with the increase in the water content. The volume of the chips increased significantly as the water content increased. The specific energy was promoted by the increase of the water content and then by the increase in the rock-breaking efficiency of the TBM disc cutter.

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Distribution Law of Excavating Load of TBM Disc Cutter and Cutterhead

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.615.22 ◽

2014 ◽

Vol 615 ◽

pp. 22-26

Author(s):

Xiang Heng Zhu ◽

Yi Min Xia ◽

Tao Ouyang ◽

Kai Yang

Keyword(s):

Yield Criterion ◽

Tunnel Boring Machine ◽

Element Model ◽

Rock Breaking ◽

Disc Cutter ◽

Distribution Law ◽

Disc Cutters ◽

Lateral Forces ◽

Simulation Results ◽

Thrust And Torque

Cutterheads and disc cutters are the key components of Tunnel Boring Machine (TBM) used to fulfill the rock-breaking task. In order to study the variation and distribution law of cutting forces induced by disc cutters on TBM cutterhead, a finite element model of rock-breaking process is established based on the extended Drucker-Prager yield criterion for rock and then the excavating process of cutterhead is simulated. The simulation results show that: in the rock fragmentation process, the rock-breaking forces are step changing; with the increase of installation radius, the vertical forces of inner and face cutters increase, while the lateral forces decrease; with the increase of installation angle, the vertical forces of edge disc cutters decrease, while the lateral forces increase; the mean total thrust and torque of cutterhead are 5418.2 kN and 1624.4 kN·m respectively, the simulation results are verified by engineering data.

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