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Factor analysis and numerical simulation of rock breaking efficiency of TBM deep rock mass based on orthogonal design

基于正交设计深部岩体中TBM 破岩效率因素的分析与数值模拟

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Abstract

This study investigates the factors affecting the rock-breaking efficiency of the TBM disc cutter in deep rock excavation, including confining pressure, penetration, cutter spacing, and revolution speed. The finite element method is employed to formulate a rock-breaking model of the rotary disc cutters and a numerical simulation is also implemented. The rock breaking effect, rock breaking volume, and rock breaking specific energy consumption under different combinations of the factors are investigated. An orthogonal test of four factors at four levels was constructed. Based on the test results and range analysis in the process of deep rock mass breaking, the order of sensitivity of each influencing factor with respect to the rock breaking specific energy for the disc cutter is cutter spacing > revolution speed > penetration > confining pressure. By constructing a numerical simulation comparison scheme, the orthogonal test results are analyzed and corroborated, and the rock breaking law and rock breaking efficiency under different influencing factors are derived. Finally, the sensitivity of different influencing factors on the rock-breaking efficiency is verified.

摘要

k]为了研究TBM 在深部岩体开挖过程中多种因素对盘形滚刀破岩效率的影响, 考虑了不同围压、贯入度、刀间距和公转速度因素的影响, 采用有限元法建立盘形滚刀回转切割破岩模型并进行数值模拟, 研究不同影响因素组合下的破岩效果、岩石破碎体积和破岩比能耗. 为了得出影响破岩效率的最敏感因素, 构建了4 因素4 水平的正交试验. 研究结果表明:在深部岩体破岩过程中, 影响因素对盘形滚刀破岩比能耗敏感度的顺序依次为刀间距、公转速度、贯入度和围压, 即刀间距是影响盘形滚刀破岩效率的主要因素. 通过数值模拟对比分析验证正交试验结果, 得出不同影响因素下的破岩规律和破岩效率, 进而验证了不同影响因素对破岩效率的敏感度.

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Authors and Affiliations

  1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, 430071, China

    Xiao-jing Li  (李晓静)

  2. College of Civil Engineering, Shandong Jianzhu University, Jinan, 250100, China

    Xiao-jing Li  (李晓静), Hua-ken Zhang  (张化恳), Yi-fan Bai  (白逸凡) & Xiang-yang Zhang  (张向阳)

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  1. Xiao-jing Li  (李晓静)
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  2. Hua-ken Zhang  (张化恳)
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  3. Yi-fan Bai  (白逸凡)
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  4. Xiang-yang Zhang  (张向阳)
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Correspondence to Xiao-jing Li  (李晓静).

Additional information

Foundation item

Project(51979156) supported by the National Natural Science Foundation of China; Project(tsqn202103087) supported by the Young Taishan Scholars, China; Project(2019KJG015) supported by the Youth Innovation Technology Project of Higher School in Shandong Province, China

Contributors

LI Xiao-jing proposed this concept and method, and edited and revised the manuscript. ZHANG Hua-ken arranged the data, simulated the software and wrote the first draft. BAI Yi-fan and ZHANG Xiang-yang used the software to establish the numerical model. The results were verified and analyzed by LI Xiao-jing and ZHANG Hua-ken. All authors responded to reviewers’ comments and revised the final version.

Conflict of interest

LI Xiao-jing, ZHANG hua-ken, BAI Yi-fan and ZHANG Xiang-yang stated that they have no conflict of interest.

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Li, Xj., Zhang, Hk., Bai, Yf. et al. Factor analysis and numerical simulation of rock breaking efficiency of TBM deep rock mass based on orthogonal design. J. Cent. South Univ. 29, 1345–1362 (2022). https://doi.org/10.1007/s11771-022-4994-9

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  • DOI: https://doi.org/10.1007/s11771-022-4994-9

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