Advanced Search
1988: THE VARIATION OF WAVE VELOCITY BEFORE RUPTURE OF SAMPLES COMPOSED OF ROCKS WITH DIFFERENT PROPERTIES. Acta Seismologica Sinica, 10(4): 437-443.
Citation: 1988: THE VARIATION OF WAVE VELOCITY BEFORE RUPTURE OF SAMPLES COMPOSED OF ROCKS WITH DIFFERENT PROPERTIES. Acta Seismologica Sinica, 10(4): 437-443.
shu

THE VARIATION OF WAVE VELOCITY BEFORE RUPTURE OF SAMPLES COMPOSED OF ROCKS WITH DIFFERENT PROPERTIES

  • Institute of Geophysics, State Seismological Bureau

More Information
  • Published Date: September 01, 2011
    Graphical Abstract
    • Abstract
  • The variation of wave velocity before rupture of samples composed of rocks with different properties was studied by the ultrasonic impulse method. The samples were rectangular plates of marble, in whose centre circular disks of marble, gabbro, granite and sandstone were inlaid. The experiments show that when the samples rupture the cracks extend through the rock disks with low strength, but round the rock disks with high strength. For the first group of samples the wave velocity in the inlaid rock disks varies visibly before rupture, while for the second group the wave velocity in the inlaid rock disks does not vary very much. Measurements of wave velocity through the interface between two rocks show that the wave velocity begins to decreas when the compression stress reaches 60% of rupture stress of the sample. The tendency of decrease of wave velocity before rupture of the samples is not monotonous, but it undulates. This makes clear that the heterogeneity of the medium can produce important influence on the law of wave velocity variation before rock rupture.
    • FullText(HTML)
    • References (1)
  • [1] Nur, A.,aud G. Simmons, Stress——induced velocity anisotropy in rock:An experimental study, J Geophys. Rer.,1969, 74, 6667——6674.

    [2] Seya, K., I. Suzuki, and H. Fuyarna, The change in ultrasonic wave velocities in triaXtally stressed brittle rock, J. Phys. Earth., 1979, 27, 409——421.

    [3] O'Connel, R.J., and B.Budiansky, Seismic velocities in dry and saturated cracked solids, J Geophys. Res.,1974, 79,5412——5426.

    [4] Gupta, N.L, Seismic velocities in rock subjected to axial loading up to shear fracture,J. Geophys. Res, 1973, 78,6936——6942.

    [5] 高梧学、木下重教、西泽修、小出仁、千薰洋,真三轴压缩下てのウエスタリ——花岗岩の弹性波速度具方性について,地震,1984,37,1,67——79.

    [6] Nishizawa, O., Seismic velocity anisotropy in a medium containing oriented cracks——transversly isotropic case. Phys. Eamh., 198?, 30, 331——347.

    [7] 刘晓杠、赖德伦,影响波速异常的两种因素,地震学报,1986,8,50——56.

    [8] 刘晓扛,岩石裂缝扩展前波速异常的实验研究,地震,1986,3; 1——4,

    [9] 董颂声、黄才中、林命遗、周宝铮、孙庆煊、朱海林、陆振飞,利用人工波源探测震前波速变化,地震学报,1982,4,1——13

    [1] Nur, A.,aud G. Simmons, Stress——induced velocity anisotropy in rock:An experimental study, J Geophys. Rer.,1969, 74, 6667——6674.

    [2] Seya, K., I. Suzuki, and H. Fuyarna, The change in ultrasonic wave velocities in triaXtally stressed brittle rock, J. Phys. Earth., 1979, 27, 409——421.

    [3] O'Connel, R.J., and B.Budiansky, Seismic velocities in dry and saturated cracked solids, J Geophys. Res.,1974, 79,5412——5426.

    [4] Gupta, N.L, Seismic velocities in rock subjected to axial loading up to shear fracture,J. Geophys. Res, 1973, 78,6936——6942.

    [5] 高梧学、木下重教、西泽修、小出仁、千薰洋,真三轴压缩下てのウエスタリ——花岗岩の弹性波速度具方性について,地震,1984,37,1,67——79.

    [6] Nishizawa, O., Seismic velocity anisotropy in a medium containing oriented cracks——transversly isotropic case. Phys. Eamh., 198?, 30, 331——347.

    [7] 刘晓杠、赖德伦,影响波速异常的两种因素,地震学报,1986,8,50——56.

    [8] 刘晓扛,岩石裂缝扩展前波速异常的实验研究,地震,1986,3; 1——4,

    [9] 董颂声、黄才中、林命遗、周宝铮、孙庆煊、朱海林、陆振飞,利用人工波源探测震前波速变化,地震学报,1982,4,1——13
    • Related Articles

  • Related Articles

    2018: 《纪念汶川大地震十周年》专辑前言. Acta Seismologica Sinica, 40(3): 1-1.
    Ma Qinzhong, Fang Guoqing, Li Wei, Zhou Jiangnan. 2013: Electromagnetic anomalies before the 2013 Lushan MS7.0 earthquake. Acta Seismologica Sinica, 35(5): 717-730. DOI: 10.3969/j.issn.0253-3782.2013.05.0010
    p class=MsoNormal style=margin: 0cm 0cm 0pt p class=MsoNormal style=margin: 0cm 0cm 0ptLiu Yuanyuan ong Jiajun Sidaoers a. 2011: Near surface wave velocity structure in Chinese capital  region based on borehole seismic records. Acta Seismologica Sinica, 33(3): 342-350.
    2010: 震源参数对强地面震动模拟结果的影响
    . Acta Seismologica Sinica, 32(1): 51-59.
    2009: 用小波方法系统检验强震“前驱波”. Acta Seismologica Sinica, 31(1): 1-12.
    2004: 华东地区地电阻率各向异性度的地震前兆异常特征初步研究. Acta Seismologica Sinica, 26(2): 223-227.
    CHEN YONGup, YANG XIANWUup2, HAN BIAOup3. 1990: SPATIAL VELOCITY VARIATIONS OF P WAVES DURING ROCK DEFORMATIONS. Acta Seismologica Sinica, 12(1): 54-59.
    LI XINGCAIup, Yu WUXINGup, SHI RUBINup, WANG MINGup, YANG RUOYIup2loans.comlucash. 1986: IN-SITU VELOCITY MEASUREMENTS. Acta Seismologica Sinica, 8(3): 334-337.
    LIU XIAOHONG, LAI DELUN hr. 1986: TWO FACTORS INFLUENCING THE ANOMALY OF WAVE VELOCITIES. Acta Seismologica Sinica, 8(1): 50-56.
    FENG DE-YI, WANG ZHOU-YUAN, Gu JIN-PING, SHENG GUO-YING, LI KE-LONG. 1980: ANOMALOUS VARIATIONS OF SEISMIC VELOCITY RATIO BEFORE THE SONG-PAN(松潘)—PINGWU(平武) EARTHQUAKE (M=7.2) OF 1976. Acta Seismologica Sinica, 2(1): 43-54.

Catalog

    Get Citation
    PDF
    XML
    Article views (999) PDF downloads (79) Cited by()
    Turn off MathJax
    Article Contents
    Abstract
    References
    Related Articles

    Supported by: Beijing Renhe Information Technology Co., Ltd.   

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return