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高地应力作用下岩石和地下硐室的动态力学行为和响应

廖志毅, 朱建波, 唐春安

廖志毅, 朱建波, 唐春安. 高地应力作用下岩石和地下硐室的动态力学行为和响应[J]. 岩土工程学报, 2016, 38(z2): 260-265. DOI: 10.11779/CJGE2016S2043
引用本文: 廖志毅, 朱建波, 唐春安. 高地应力作用下岩石和地下硐室的动态力学行为和响应[J]. 岩土工程学报, 2016, 38(z2): 260-265. DOI: 10.11779/CJGE2016S2043
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LIAO Zhi-yi, ZHU Jian-bo, TANG Chun-an. Dynamic behavior and response of rock and underground openings subjected to high initial stresses[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(z2): 260-265. DOI: 10.11779/CJGE2016S2043
Citation: LIAO Zhi-yi, ZHU Jian-bo, TANG Chun-an. Dynamic behavior and response of rock and underground openings subjected to high initial stresses[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(z2): 260-265. DOI: 10.11779/CJGE2016S2043
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高地应力作用下岩石和地下硐室的动态力学行为和响应  English Version

  • 1. 大连理工大学岩石破裂与失稳研究所,辽宁 大连 116024;
    2. 香港理工大学土木与环境工程学系,香港;
    3. 天津大学建筑工程学院水利工程 仿真与安全国家重点实验室,天津 300072;
    4. 四川大学水力学与山区河流开发保护国家重点实验室,四川 成都 610065

基金项目: 中国香港研究资助项目（25201814）; 国家自然科学基金项目（41402241）; 国家重点基础研究发展计划（“973”计划）项目（2014CB047103）
详细信息
    作者简介:

    廖志毅(1989- ),男,博士研究生,主要从事岩石动力学方面的研究工作。E-mail: jianbo.zhu@polyu.edu.hk。

Dynamic behavior and response of rock and underground openings subjected to high initial stresses

  • 1. Institute of Rock Instability and Seismicity Research, Dalian University of Technology, Dalian 116024, China;
    2. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China;
    3. Sate Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Civil Engineering, Tianjin University, Tianjin 300072, China;
    4. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China

摘要

    摘要
  • 摘要: 采用基于FEM和连续损伤力学的RFPA数值模拟软件,首先从实验室尺度出发,建立了模拟的SHPB（split Hoplinson pressure bar）数值模型,分析了不同初始地应力作用下岩石材料的动态力学特性。数值模拟结果表明,岩石的动态压缩强度随着埋深与初始水平地应力与垂直地应力比值K的增加而增加。随后,从岩石工程尺度,考虑岩体内的不连续节理面的影响。建立动荷载作用下节理岩体地下洞室数值模型,系统分析了柱面波和平面波在节理岩体内部的传播规律以及节理力学性质和空间分布对地下洞室动态响应的影响。研究表明,除节理面处透反射和岩体损伤破坏导致的波衰减外,柱面波存在额外的几何衰减。同时,节理的力学性质与空间分布直接决定了应力波在节理面处的透反射规律,从而进一步影响了地下硐室的破坏程度与硐室壁处PPV（Peak particle velocity）结果。
    Abstract: The FEM and continuous damage mechanics-based numerical code RFPA is selected as the research tool. First of all, from the view of laboratory scale, numerical SHPB (split Hopkinson pressure bar) system is established to investigate the dynamic behavior of rocks under in-situ stresses. The derived results show that the dynamic compressive strength of rock increases with the increasing depth and parameter K which is defined as the ratio of horizontal stress to vertical one. Subsequently, from the view of rock engineering scale, dynamic response of underground openings under plane and cylindrical wave disturbances are numerically investigated. In the numerical model, the properties and distribution of rock joints are fully taken into consideration. The simulated results indicate that the additional attenuation of cylindrical waves occurs as the propagation distance increases in addition to the wave attenuation caused by rock and joint damage and wave reflection and transmission along joint surfaces. Moreover, it is found that the properties and distribution of joints directly determine the wave reflection and transmission along joint surfaces, which will further influence the damage degree and PPV (peak particle velocity) results of the underground openings.
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出版历程
  • 收稿日期:  2016-05-18
  • 发布日期:  2016-10-19

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