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JIN YAO, ZHANG TIANZHONG, HUA ZHENGXING, XU MINGFA, HUANG PINGZHANG. 1983: THE ELECTRICAL RESISTIVITY CHANGES AND VOLUMETRIC STRAIN OF WATER-BEARING CRACKED ROCK SAMPLES UNDER UNIAXIAL COMPRESSION. Acta Seismologica Sinica, 5(1): 99-106.
Citation: JIN YAO, ZHANG TIANZHONG, HUA ZHENGXING, XU MINGFA, HUANG PINGZHANG. 1983: THE ELECTRICAL RESISTIVITY CHANGES AND VOLUMETRIC STRAIN OF WATER-BEARING CRACKED ROCK SAMPLES UNDER UNIAXIAL COMPRESSION. Acta Seismologica Sinica, 5(1): 99-106.
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THE ELECTRICAL RESISTIVITY CHANGES AND VOLUMETRIC STRAIN OF WATER-BEARING CRACKED ROCK SAMPLES UNDER UNIAXIAL COMPRESSION

  • Institute of Geophysics, State Seismological Bureau

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  • Published Date: August 31, 2011
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    • Abstract
  • The axial and transversal electrical resistivity changes in water-bearing, and high temperature baked gabbro rock samples together with their volumetric strain have been measured simultaneously and continuously under uniaxial compression. The measurement shows that the value of resistivity decreases at first before complete water saturation in the stage of non-elastic compression, then it begins to increase in the stage of complete water saturation and elastic compression. Finally the resistivity increases again during the last non-elastic dilatancy stage. According to Archies law, an approximate relationship between the resistivity change and volumetric strain has been obtained through mathematical analysis. Qualitatively, our experimental results are in agreement with it, but not quantitatively. The main result obtained is that the electrical resistivity of water-saturated rock samples increases during the dilatancy stage under uniaxial compression. It may be explained by decrease of water saturation as caused by reopening of the heated cracks.
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    • References (1)
  • [1] 钱复业、赵玉林,地震前地电阻变化十例,地震学报,2, 2, 1980,

    [2] A. Mazzella and' Morrison, Electrical resistivity variations associated with earthquakes on the San Andreas fault, Science, 185, 855——857, 1974.

    [3] V. I. Mjachkin, et al., Two models for earthquake forerunners, Petrc 9ppl. Geoplay., 113, 169——181,1975.

    [4] M. D. Zoback and J. D. Byerlee. The effect of micro——crack dilatancy on the permeability of wes——terly granite, J. Geophys. Res., 80,, 752——755, 1975.

    [5] E. I. Parkhomenko and A. J. Bondarenko, Effect of uniaxial pressure on electrical resistivity of rocks, Bull.A cad. S., USSR, Geophysics, Ser, 2, 326, 1960.

    [6] N. Fujii ands Y. Iiamano, Anisotropic changes in resistivity and velocity dluring rock deformation, High——pressure research applications in geophysics, Edited by Murlih. Manghnani and Syun——

    [7] iti Akimote, Academic press, New York, 53——63, 1977.

    [8] W. F. Brance, A. S. Orange, and T. M.’Madden, The effect of pressure on the electrical resistivity of water——saturated crystalline rocks, J. Geophys. Res., 70(22), 5669——5678, 1965.

    [9] W. F. Brace and A. S. orange, Further studies of the effects of pressure on electrical resistivity of rocks, J. Geophys. Res., 73(16). 5407——5420, 1968.

    [10] W. F. Brance, Dilatancy——related electrical resistivity changes in rocks, Pure Appl. Geophys., 113, 207——217, 1975

    [1] 钱复业、赵玉林,地震前地电阻变化十例,地震学报,2, 2, 1980,

    [2] A. Mazzella and' Morrison, Electrical resistivity variations associated with earthquakes on the San Andreas fault, Science, 185, 855——857, 1974.

    [3] V. I. Mjachkin, et al., Two models for earthquake forerunners, Petrc 9ppl. Geoplay., 113, 169——181,1975.

    [4] M. D. Zoback and J. D. Byerlee. The effect of micro——crack dilatancy on the permeability of wes——terly granite, J. Geophys. Res., 80,, 752——755, 1975.

    [5] E. I. Parkhomenko and A. J. Bondarenko, Effect of uniaxial pressure on electrical resistivity of rocks, Bull.A cad. S., USSR, Geophysics, Ser, 2, 326, 1960.

    [6] N. Fujii ands Y. Iiamano, Anisotropic changes in resistivity and velocity dluring rock deformation, High——pressure research applications in geophysics, Edited by Murlih. Manghnani and Syun——

    [7] iti Akimote, Academic press, New York, 53——63, 1977.

    [8] W. F. Brance, A. S. Orange, and T. M.’Madden, The effect of pressure on the electrical resistivity of water——saturated crystalline rocks, J. Geophys. Res., 70(22), 5669——5678, 1965.

    [9] W. F. Brace and A. S. orange, Further studies of the effects of pressure on electrical resistivity of rocks, J. Geophys. Res., 73(16). 5407——5420, 1968.

    [10] W. F. Brance, Dilatancy——related electrical resistivity changes in rocks, Pure Appl. Geophys., 113, 207——217, 1975
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