A Method to Predict Disc Cutter Specific Energy for TBM Based on CSM Model

2012 ◽  
Vol 236-237 ◽  
pp. 414-417
Author(s):  
Gang Li ◽  
Li Da Zhu ◽  
Jian Yu Yang ◽  
Wan Shan Wang
Keyword(s):  
Specific Energy ◽  
Performance Prediction ◽  
Dynamic Models ◽  
Tunnel Boring Machine ◽  
Disc Cutter ◽  
Energy Prediction ◽  
Tunnel Boring ◽  
Csm Model ◽  
Tbm Cutter ◽  
Cutter Head

By using fracture mechanics theory of rock, the rock fragmentation mechanism of tunnel boring machine (TBM) cutters is analyzed and the analysis of forces of cutter is carried out. A new method to predict disc cutter specific energy for TBM is developed in this study. By using the dynamic models of TBM cutters interaction with the rock, specific energy prediction model for TBM cutter head is developed. The data from the actual tunnel construction is analyzed by using an example of Qinling tunnel and the comparison is made with the field data. The results indicate that the model developed in this study could not only replace the experiment to disc cutter specific energy for TBM, but also provide a theoretical basis for the performance prediction and optimal design of cutter head for TBM.

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

2019 ◽  
Vol 9 (1) ◽  
pp. 194 ◽  
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.

The Crushing Mode and the Optimal Penetration of Two Disc Cutters Cutting Marble under Different Confining Stress

2013 ◽  
Vol 353-356 ◽  
pp. 1417-1421 ◽  
Author(s):  
Bin Shen ◽  
Yi Min Xia ◽  
Jian Jian Gu ◽  
Yan Chao Tian
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Specific Energy Consumption ◽  
Tunnel Boring Machine ◽  
Element Model ◽  
Confining Stress ◽  
Tunnel Boring ◽  
Disc Cutters ◽  
Full Face ◽  
Rock Tunnel

According to the actual working condition of the full face hard rock tunnel boring machine (TBM), a 2-D discrete element model for breaking marble by two TBM disc cutters is established, it simulates the whole progress of cracks production and propagation under different confining stress and penetration; based on CSM prediction model, forces of two cutters and specific energy consumptions are calculated to determine the best penetration. The simulating result shows that there are three kinds of breaking modes of marble under different confining stress and penetration; As well as the trend that specific energy consumption decrease first and then increase with the penetration increases, and there is optimal penetration to make specific energy consumption the lowest each confining stress. The optimal penetration and the lowest specific energy consumption are determined when confining stress range from 0 to 40MPa according to the simulation results.

Fatigue Reliability and Optimal Design Research of TBM Cutter

2011 ◽  
Vol 328-330 ◽  
pp. 18-21
Author(s):  
Zhao Qian Wang ◽  
Tian Biao Yu ◽  
Ye Zou ◽  
Chang Xin Wang ◽  
Hai Feng Zhao ◽  
...  
Keyword(s):  
Design Research ◽  
Tunnel Boring Machine ◽  
Soil Conditions ◽  
Fatigue Reliability ◽  
Element Analysis ◽  
Tunnel Boring ◽  
Actual Design ◽  
Cad Models ◽  
Product Manufacturing ◽  
Tbm Cutter

Tools of tunnel boring machine CAD models have been built by CAD software, it is analyzed static characteristics and fatigue characteristics by finite element analysis and obtaining the displacement in the poor stiffness conditions. Improving its structure to strengthen stiffness and fatigue life by the calculate result. The final result shows that the structure can satisfy its rigid command and can fit the soil conditions above 5%-10%. Damage frequency of tools is greatly deduced. It provides a theoretical basis for the actual design and product manufacturing.

Performance prediction of tunnel boring machine through developing a gene expression programming equation

2017 ◽  
Vol 34 (1) ◽  
pp. 129-141 ◽  
Author(s):  
Danial Jahed Armaghani ◽  
Roohollah Shirani Faradonbeh ◽  
Ehsan Momeni ◽  
Ahmad Fahimifar ◽  
M. M. Tahir
Keyword(s):  
Gene Expression ◽  
Performance Prediction ◽  
Gene Expression Programming ◽  
Tunnel Boring Machine ◽  
Tunnel Boring

Research on the Rock Breaking by Double Disc Cutter Test-Bed

2013 ◽  
Vol 690-693 ◽  
pp. 2484-2489 ◽  
Author(s):  
Peng Zhou ◽  
Chao Wang ◽  
Wei Xian Gao ◽  
Yu Hou Wu
Keyword(s):  
Maximum Stress ◽  
Tunnel Boring Machine ◽  
Rock Breaking ◽  
Disc Cutter ◽  
Test Bed ◽  
Underground Engineering ◽  
Tunnel Boring ◽  
Disc Cutters ◽  
Optimal Spacing ◽  
Rock Tunnel

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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