Numerical study on the rock muck transfer process of TBM cutterhead with clump strategy based on discrete element method

Geng, Qi; Zhang, Huijian; Liu, Xiaohui; Wang, Xuebin

doi:10.1016/j.tust.2019.103000

Cited by 18 publications

(7 citation statements)

References 54 publications

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“…A comparison is made between field observations and the material stream bed depth profiles obtained using the DEM. The cross-sectional bulk solid material stream profiles at loading are also assessed against those predicted by design guideline CEMA [8][9][10] the material velocity at loading is significantly lower than the receiving conveyor and incoming conveyor belt speed [10,11].…”

Section: Methodsmentioning

confidence: 99%

“…The choice of the optimum conveyor system depends on full knowledge of the construction characteristics and the forces involved that apply themselves to all the system components [6]. The utilization of adequate accessories to pattern the coal in the discharge yields corresponding improvements to increase the life of the installation with minor maintenance [11,12]. By correctly modeling the individual properties of a system, its complex, and often-chaotic behavior, can be analyzed, altered, and improved [13,14].…”

Section: Modeling Operational With a Knife Gate In Settling Zonementioning

confidence: 99%

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Coal Flowability Control on Preventing Spillage on Conveyor Belt Through Modeling and Simulation for Improving its Performance

Bahrun

Yusoff

Said

et al. 2021

ARFMTS

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Belt conveyors are generally used in mining plant areas, both surface and underground mines. The belt conveyor is mainly applied to transport the extracted bulk material from the mining site to delivery. The effectiveness of the extraction process depends on the reliability and durability of the conveyor belt system. In addition, conveyor performance is very important specially to control material flowability to prevent spills or other operational disturbances to optimize production throughput. However, the transfer chute and settling zone can cause some problems during the transfer process, such as material spills. This problem can reduce the function and performance of the conveyor belt. This paper discusses a design model to reduce the problem of spillage in the settling zone. The model was developed by compiling the previous defecting data from the durability of the conveyor system, then analyzed using Discrete Element Method (DEM) software and compared with bulk characteristics. The initial performance of certain conveyors is only capable of serving with an average production of 76% of the designed capacity while energy is consumed at full load. By applying the DEM simulation result, the blade gate can reduce the peak angle break in the depositional zone before exiting. After the analysis is completed using DEM, the conveyor increases the average production to 95% of the designed capacity. In conclusion, controlling the maximum belt load without spillage will reduce interruption on conveyor belt operation and maintenance costs therefore increase plant reliability and availability.

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Section: Methodsmentioning

confidence: 99%

Section: Modeling Operational With a Knife Gate In Settling Zonementioning

confidence: 99%

Coal Flowability Control on Preventing Spillage on Conveyor Belt Through Modeling and Simulation for Improving its Performance

Bahrun

Yusoff

Said

et al. 2021

ARFMTS

View full text Add to dashboard Cite

show abstract

“…Qi et al (2019) analyzed the rock muck transfer process of shield cutterhead and thrust in the construction process. Many numerical studies have been conducted to simulate the cutterhead thrust and dynamic characteristics of shields [11][12][13]. Various methods were proposed to measure and record the working data of shield cutterhead [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Research Studies on the Thrust of Special‐Shaped Full‐Sectional Cutterheads of Quasirectangular Shield

Wang

Zhang

et al. 2021

Advances in Civil Engineering

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Thrust of shield cutters is the major parameter of tunnel construction and an important index for shield machine design. The thrust bearing resistance of a shield machine has a significant impact on its construction efficiency and safe operation. The use of quasirectangular shield not only can increase the space utilization rate but also avoid the deformation of the back soil when compared with a conventional circular or rectangular shield. In this paper, structural analysis of quasirectangular shield cutterhead is carried out and a corresponding mathematical thrust model is developed. Both the stress and displacement distributions of cutterhead are calculated. It is found that the stress value in most regions of the cutterhead is between 5 MPa and 45 MPa. The maximum stress is 208.44 MPa, which is at the middle part of the rib and is below the yield limit. The maximum deformation is found in the center area of the chest plate, the value of which is also within the design requirement. In addition, a monitoring method suitable for quasirectangular shield is proposed. The appropriateness and reliability of the proposed monitoring method are demonstrated by the comparison between the numerical simulation and monitoring method.

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“…But the shape characteristic and size distribution of muck was not considered in their simulation. Geng et al (2019) has investigated numerous factors affecting the ability and stability of muck removal process, but the results were only effective for specific geological conditions. From all these abovementioned studies, there is an urgent need for an accurate numerical model for muck removal process to provide a comprehensive understanding of the muck removal mechanism.…”

Section: Introductionmentioning

confidence: 99%

Influence of Geological Properties and Operational Parameters on TBM Muck Removal Performance for Yinsong Tunnel

Xia

Mei

et al. 2021

Geotech Geol Eng

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Operational parameters of a Tunnel Boring Machine (TBM) under different geological properties have significant influence on muck removal performance. To improve the muck removal performance for Yinsong Tunnel TMB, tuff and granite properties were surveyed by geological detection in the tunnel project, and the optimization of advancement and rotational speed of cutterhead was investigated. The muck model was established by discrete element method (DEM), considering the shape characteristic of muck. The whole muck removal process was simulated, then the influence of the advancement speed and rotational speed on muck removal performance in tuff and granite stratum was studied via numerical simulations. Based on simulation results, the muck removal performance evaluation system of TBM is built using fuzzy mathematics and evaluation theory. Ultimately, optimal operation parameters in the tunnel project is obtained after comprehensive evaluation. The results indicated that the optimum advancement speed should be 7 r/min in both tuff and granite stratum, while the optimal rotational speed was 6 r/min in granite and 5.5 r/min in tuff respectively. Based on TBM engineering application, the size characteristic of muck was obtained from on-site muck specimen analysis and the muck removal performance of TBM under different operation and rock conditions was compared to validate the simulation method. These findings could provide guidance for TBM operation to improve muck removal performance in different geological conditions.

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Numerical study on the rock muck transfer process of TBM cutterhead with clump strategy based on discrete element method

Cited by 18 publications

References 54 publications

Coal Flowability Control on Preventing Spillage on Conveyor Belt Through Modeling and Simulation for Improving its Performance

Coal Flowability Control on Preventing Spillage on Conveyor Belt Through Modeling and Simulation for Improving its Performance

Research Studies on the Thrust of Special‐Shaped Full‐Sectional Cutterheads of Quasirectangular Shield

Influence of Geological Properties and Operational Parameters on TBM Muck Removal Performance for Yinsong Tunnel

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