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.
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References
Stopiński W., andDmowska R.,Rock resistivity in the Lubin (Poland) copper mine and its relation to variations of strain field and occurrence of rockbursts, InProc. 1st Intern. Congress on Rockbursts and Seismicity in Mines, Johannesburg, 1982, Gay, N. C. and Wainwright, E. H., eds. (SAIMM Johannesburg 1984) pp. 297–307.
Stopiński W., andTeisseyre, R. (1982),Precursory Rock Resistivity Variations Related to Mining Tremors, Acta Geophys. Pol.30 (4), 293–320.
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Stopiński, W., Sobolev, G.A., Ponomaryov, A.W. et al. Fast-changing processes in a medium subject to loading as detected by resistivity measurements. PAGEOPH 136, 49–58 (1991). https://doi.org/10.1007/BF00878887
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DOI: https://doi.org/10.1007/BF00878887