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Detecting rupture precursors and determining the main fracture spread direction of rock with dynamic rock resistivity change anisotropy |
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| Authors: | FENG CHEN JI-GANG XIU JIN-ZHEN AN CHUN-TING LIAO DA-YUAN CHEN |
| Institution: | 1. Department of Geophysics, Peking University, Beijing 100871, China 2. Beijing Seismological Bureau, Beijing 100080, China 3. Geomechanics Institute of Territories Resources Ministry, Beijing 100081, China |
| Abstract: | In the past, domestic and abroad scientific workers have done a large number of experiment researches on a great number of researches of experiment for the relationship between electrical resistivity change and the load stress on rock (Geoelectric Testing Group, Department of Geophysics, Peking University and Research Division, Seismological Brigade of Lanzhou, 1978; Zhang, 1981; Chen, et al, 1983; Zhao, et al, 1983; Zhang, Lu, 1983; Zhang, et al, 1985; Brace, Orange, 1968; Kurite, 1986; Teisseyre, 1989), such as imitating dynamic fracture of rock, frictional sliding course, and observing its resistivity change shape with a lot of experimental workssuch as simulating the dynamic course of crustal rocks fracturing and frictional slipping along the fracture surface, and observing its resistivity change shape with experiment. They found that, in the fracture process of rock under loading, not only its resistivity shape change notably, and its direction changes also very clearly, and therefore many scientific workers have shown strong interest in anisotropy of resistivity change, and have done some researches onfor it. |
| Keywords: | electric resistivity of rock earth resistivity anisotropy in resistivity earthquake geologic hazard |
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