Browse > Article

A Basic Study on Micro-Electric Potential accompanied with Specimen Failure during Uniaxial Compressive Test  

Kim, Jong-Wook (Geotechnical Engineering Div., KIGAM)
Park, Sam-Gyu (Geotechnical Engineering Div., KIGAM)
Song, Young-Soo (Department of Mineral Resource & Energy Engineering, Chonbuk National University)
Sung, Nak-Hun (Geotechnical Engineering Div., KIGAM)
Kim, Jung-Ho (Geotechnical Engineering Div., KIGAM)
Cho, Seong-Jun (Geotechnical Engineering Div., KIGAM)
Publication Information
Geophysics and Geophysical Exploration / v.10, no.3, 2007 , pp. 203-210 More about this Journal
Abstract
As a part of basic studies on monitoring of landslides and slope stability using SP measurements, micro-electric potentials of rock samples were measured accompanied with the rock failure by a uniaxial loading test were measured. The measurement system consists of a 8 channel A/D converter with 24 bit resolution, uniaxial loading tester, strain gages and 4 sets of electrode attached to a rock sample. Rock samples of granite, limestone, and sandstone were tested. Also, mortar samples were tested in order to monitor electric-potentials of a uniform sample. Micro-electric potentials were detected in all saturated samples and the strength of them increased as the loading force increased. Sandstone samples showed the largest strength of micro-electric potential and it followed limestone and granite samples, which indicates a positive relationship with porosity of rocks. The mechanism generating these micro-electric potential can be explained in terms of electro-kinetics. In case of dry samples, micro-electric potential could be observed only in sandstone samples, where piezoelectric effect played main role due to high contents of quartz in sandstone samples. We found that biggest micro-electric potentials were observed at the electrodes near the crack surface of rock samples. This is very encouraging result that SP monitoring can be applied to predicting landsliding or to estimate collapsing position combining with monitoring of acoustic emissions.
Keywords
micro-electric potentials; uniaxial loading; porosity; piezoelectric;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Clint, O. C., Eccles, D., and Sammond P. R., 2005, Laboratory studies of electrical potential during rock failure, Int. J. Rock Mech. Min. Sci., 934-949
2 Overbeek, J. Th. G., 1952, Electrochemistry of the double layer, in Colloid Science, Irreversible Systems, (eds) H.R Kruyt, Elsevier, New York, 115-193
3 Clint, O. C., 1999, Electrical potential changes and acoustic emission generated by fracture and fluid flow during experimental triaxial rock deformation, Ph. D. thesis, University London, 1-236
4 Yoshida, S., Clint, O. C., and Sammonds, P. R., 1998, Electric potential changes prior to shear fracture in dry and saturated rocks, Geophys. Res. Lett., 1577-1580
5 조성준, 김정호, 성낙훈, 정지민, 2005, PXI를 이용한 다목적 물 리탐사 측정 시스템, 물리탐사, 제 7권, 3호, 224-231
6 Warwick, J. W., Stoker, C., and Meyer, T. R., 1982, Ratio emission associated with rock fracture: Possible application to the great Chilean earthquake of May 22, 1960, J. Geophys.Res., 87, 2851-2859   DOI
7 Ahmad, U., 1964, A laboratory study of steaming potentials, Geophys, Prospect, 159-162
8 곽두영, 2002, $Labview^{TM}$ 컴퓨터 기반의 제어와 계측 Solution, Ohm사
9 Kusakabe, Y., Ito, Y., Enomoto, Y., and Murayama, H., 2004b, Basic research for micro geo-electric signal generated while compressing rock, JSEG 2003 Conference, Sapporo, 55-56. (in Japanese)
10 Kusakabe, Y., Ito, Y., Hashimoto, S., Murayama, H., Kato, T., and Nagao, T., 2004a, Basic study on the monitoring method for the rock slope failure using the micro geo-electric signals, Proceeding of the ISRM International Symposium 3rd ARMS, 83-88
11 Yoshida, S., Manjgaladze, P., Zilpimiani, D., Ohnaka, M., and Nakatani, M., 1994, Electromagnetic emission associated with frictional sliding of rock. In: Electromagnetic phenomena related to earthquake prediction, (eds) Hayakawa, M, and Fujinawa, Y., 307-322, Terrapub, Tokyo
12 김종욱, 조성준, 박삼규, 성낙훈, 송영수, 2007, 시료 파괴 시 발생하는 SP에 관한 기초 연구, 한국물리탐사학회.대한지구물리학회 공동학술대회논문집, 323-328
13 Ogawa, T., Oike, K., and Miura, T., 1985, Electromagnetic radiations from rocks, J. Geophys. Res., 90(D4), 6245-6249   DOI
14 Yoshida, S., Uyeshima, M., and Nakatani, M., 1997, Electric potential changes associated with slip failure of granite: preseismic and coseismic potential, J. Geophys Res., 14483-14497