东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (4): 587-590.DOI: -

• 论著 • 上一篇    下一篇

岩体隧洞损伤破坏过程实验及其颗粒流数值模拟

王述红;徐源;张轮;张敏思;   

  1. 东北大学资源与土木工程学院;中铁二院工程集团有限责任公司;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家重点基础研究发展计划项目(2007CB209405);;

Laboratory experiments on the process of rock tunnel failure and its particle flow numerical simulation

Wang, Shu-Hong (1); Xu, Yuan (1); Zhang, Lun (2); Zhang, Min-Si (1)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China; (2) China Railway Eryuan Engineering Group Co. Ltd., Chengdu 610031, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Wang, S.-H.
  • About author:-
  • Supported by:
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摘要： 在以往有关节理模型实验和数值模拟的研究基础上,设计了几组含孔洞节理模型材料的压缩实验,并采用颗粒流软件Particle Flow Code(PFC2D)对模型实验过程进行数值模拟.以模型实验应力-应变曲线与数值模拟的曲线吻合作为PFC细观力学参数选取的准则,并利用获得的力学参数对含孔洞节理岩体破坏过程进行数值再现.分析了含孔洞节理岩体的损伤破坏演化过程、变形破坏机制及其强度特性.并将整个过程分为线弹性阶段、初裂阶段、峰值阶段和峰后阶段.该破坏机制可以合理地预测实际工程的可能破坏模式和评价工程岩体的稳定性.

关键词: 岩石力学, 颗粒流, 圆形孔洞, 数值模拟, 声发射, 破坏机制

Abstract: Based on previous jointed model tests and numerical simulation studies, several groups of material compression tests were designed on joint models with holes, and model experimental processes were simulated with particle flow code software (PFC2D). Tallies of the stress-strain curve and numerical simulation curve were taken as selection criterion of PFC mesomechanics parameters in the model experiment. After that, the failure process of jointed rockmass with holes was simulated by the mesomechanics parameters to reappear. The failure process and mechanism of jointed rockmass with holes are discussed. The entire process was divided into four stages, including the linear elastic stage, the early crack stage, the peak stage, and post-peak stage. This failure mechanism can reasonably predict the failure mode of the actual engineering and evaluate the stability of engineering rockmass.

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