›› 2017, Vol. 38 ›› Issue (6): 1541-1549.doi: 10.16285/j.rsm.2017.06.001

• 基础理论与实验研究 •    下一篇

不同双向侧压作用下TBM滚刀侵入破岩特征及效率研究

刘京铄1, 2，曹 平1，范金星2，张春阳3，汪文萍2，刘 斌2   

  1. 1. 中南大学 资源与安全工程学院，湖南 长沙 410083；2. 湖南水利水电职业技术学院水利工程系，湖南 长沙 410131； 3. 武汉理工大学 资源与环境工程学院，湖北 武汉 430070
  • 收稿日期:2016-11-04 出版日期:2017-06-12 发布日期:2018-06-05
  • 作者简介:刘京铄，男，1979年生，博士研究生，讲师，主要从事岩石力学与工程方面的研究和教学工作。
  • 基金资助:

    国家重点基础研究发展计划（973）项目（No.2013CB035401）；国家自然科学基金资助项目（No.51274249）；国家自然科学基金青年资助项目（No.51404179）；湖南省教育厅科研项目（No.C140749）。

A study on rock breaking characteristics and efficiency with TBM cutters in a biaxial state

LIU Jing-shuo1, 2, CAO Ping1, FAN Jin-xing2, ZHANG Chun-yang3, WANG Wen-ping2, LIU Bin2   

  1. 1. School of Resource and Safety Engineering, Central South University, Changsha, Hunan 410083, China; 2. Department of Hydraulic Engineering, Hunan Polytechnic of Water Resources and Electric Power, Changsha, Hunan 410131, China; 3. School of Resource and Environment Project, Wuhan University of Technology, Wuhan, Hubei 430070, China
  • Received:2016-11-04 Online:2017-06-12 Published:2018-06-05
  • Supported by:

    This work was supported by the National Basic Research Program of China (2013CB035401), the National Natural Science Foundation of China (51274249), the National Natural Science Foundation for Young Scientists of China (51404179) and the Education Department of Hunan Province China (14C0746).

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摘要： 为研究不同双向围压条件下TBM滚刀破岩特征及效率，基于真三轴试验平台进行了滚刀顺次侵入试验，并利用形貌扫描仪对滚刀侵入后形成的破碎坑形态及体积进行了分析。结合裂纹发育及滚刀破岩效率分析，结果表明：当较小围压（Sig_1）一定时，随着围压差的增大，虽然 TBM滚刀侵入过程中的侵入能量逐渐增大，但其形成的破碎坑体积也随之增大，进而导致其破岩效率的增大。当较大围压（Sig_2）一定时，随着较小围压的增大，其侵入能量也随之增大，但其破碎坑体积随之减小，进而导致其破岩效率降低。

关键词: 双向围压, TBM滚刀, 破岩特征, 破碎坑形态

Abstract: To investigate rock breaking mechanisms induced by cutters of tunnel boring machine (TBM) under a biaxial state, TBM indentation tests were conducted on granite specimens using a triaxial testing platform. Then, detailed morphological measurement was carried out to analyze the morphology and volume of the fractured surface using a surface profilometer. It is found that the increase of differential stress results in the increase of consumed energies, the growth of groove volumes and the efficiency of indentation when the Sig_1 (i.e., the smaller confining pressure) was fixed. The energy of indentations increases as the differential stress decreases, but the groove volumes are decreased, and thus the indentation efficiency is restrained by the decline of the differential stress when the Sig_2 (i.e., the bigger confining pressure) was fixed.

Key words: biaxial stress state, TBM cutter, rock breaking characteristics, groove morphology

中图分类号: 

  • TU 43

[1] 郭汝坤 ，冯 春 ，李战军 ，李世海,. 岩体强度对牙轮单齿作用下破碎坑的体积及形态影响研究[J]. , 2016, 37(10): 2971-2978.
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