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白云岩受压声学特性及其在裂缝研究中的应用

朱洪林 陈乔 徐小虎 刘洪 文翔宇 陈吉龙 彭伟 赵彬凌

朱洪林, 陈乔, 徐小虎, 刘洪, 文翔宇, 陈吉龙, 彭伟, 赵彬凌. 白云岩受压声学特性及其在裂缝研究中的应用[J]. 力学学报, 2019, 51(3): 949-960. doi: 10.6052/0459-1879-18-328
引用本文: 朱洪林, 陈乔, 徐小虎, 刘洪, 文翔宇, 陈吉龙, 彭伟, 赵彬凌. 白云岩受压声学特性及其在裂缝研究中的应用[J]. 力学学报, 2019, 51(3): 949-960. doi: 10.6052/0459-1879-18-328
Honglin Zhu, Qiao Chen, Xiaohu Xu, Hong Liu, Xiangyu Wen, Jilong Chen, Wei Peng, Binling Zhao. THE ACOUSTIC CHARACTERISTICS OF DOLOMITE UNDER COMPRESSION AND ITS APPLICATION IN THE CRACK RESEARCH[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(3): 949-960. doi: 10.6052/0459-1879-18-328
Citation: Honglin Zhu, Qiao Chen, Xiaohu Xu, Hong Liu, Xiangyu Wen, Jilong Chen, Wei Peng, Binling Zhao. THE ACOUSTIC CHARACTERISTICS OF DOLOMITE UNDER COMPRESSION AND ITS APPLICATION IN THE CRACK RESEARCH[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(3): 949-960. doi: 10.6052/0459-1879-18-328

白云岩受压声学特性及其在裂缝研究中的应用

doi: 10.6052/0459-1879-18-328
基金项目: 1) 国家自然科学基金项目(41502287),重庆市自然科学基金项目(cstc2018jcyjAX0670,cstc2015jcyBX0120),重庆市国土局科技计划 项目(CQGT-KJ-2017026,CQGT-KJ-2014037),重庆市技术创新与应用示范重点研发项目(cstc2018jscx-mszdX0074)和重庆市社会事业与民生保障科技创新专项(cstc2017shmsA120001)资助.
详细信息
    通讯作者:

    陈乔

  • 中图分类号: TE311;

THE ACOUSTIC CHARACTERISTICS OF DOLOMITE UNDER COMPRESSION AND ITS APPLICATION IN THE CRACK RESEARCH

  • 摘要: 通过实验手段研究了白云岩在三轴和单轴加载过程中的声波波速、幅度、频谱特性的变化特征. 结果发现:(1)白云岩在受压变形过程中,声波波速的变化较好地反映了岩石内部裂缝的闭合、产生、扩展和贯穿等变化. 总体而言,横波波速比纵波能更好地预测裂缝的产生,而纵波对裂缝的非稳定发展或贯穿有较敏感的反映. (2)随着轴压的增大,纵、横波波形的末端都有散射波的出现,且横波波形末端的"鱼尾"状散射波信号更为明显(此时应力点为极限强度的60%左右),预示着岩石内部裂缝的产生和稳定扩展. (3)频谱曲线也很好地反映了岩石内部结构变形情况. 随着岩石受力的增大,频谱曲线上的振幅都呈现增大趋势,标志着岩石的压实阶段;当频谱曲线上低频段较高频段活跃时,标志着裂缝的产生;更有甚者,低频还会取代高频成为主频. (4)在岩石受压裂缝闭合阶段,首波振幅和频谱主振幅都呈现上升趋势;而在裂缝不稳定扩展阶段,主振幅表现出比首波振幅低的上升趋势;振幅曲线达到峰值后都存在一突降拐点,预示着岩石的贯通破坏. 研究对于地层岩石的动态长期监测和工程岩体的稳定性评价都具有重要的理论参考价值.

     

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  • 收稿日期:  2018-10-09
  • 刊出日期:  2019-05-18

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