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Fast-changing processes in a medium subject to loading as detected by resistivity measurements |
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| Authors: | Wojciech Stopiński Gienadiy A Sobolev Aleksandr W Ponomaryov Vladimir Los |
| Institution: | (1) Institute of Geophysics, Polish Academy of Sciences, Warsaw, Poland;(2) Institute of the Earth Physics, USSR Academy of Sciences, Moscow, USSR |
| Abstract: | Making measurements of electric resistivity at 16 s intervals, the authors noticed fast changes of this parameter prior to the occurrence of the main fracture. The changes are superposed on bay pulsations of increasing amplitude and decreasing period. This finding opens prospects for a wider use of an electric resistivity method and proves the high quality of automatic instruments, in particular their high resolution. It also gives evidence for the occurrence of short-period precursors in the fracture zone while the main fracture is being formed. |
| Keywords: | Rock resistivity measurements laboratory experiments on fracturing rockburst and earthquake precursors dilatancy avalanche development of microcracks |
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