Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
Nat. Hazards Earth Syst. Sci., 7, 149-154, 2007
https://doi.org/10.5194/nhess-7-149-2007
© Author(s) 2007. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.
 
26 Jan 2007
Electric signal emissions during repeated abrupt uniaxial compressional stress steps in amphibolite from KTB drilling
D. Triantis1, C. Anastasiadis1, F. Vallianatos2, P. Kyriazis1,3, and G. Nover4 1Technological Educational Institution of Athens, Athens, Greece
2Technological Educational Institute of Crete, Chania, Greece
3Brunel University, Uxbridge, London, UK
4Mineralogisches Institut der Universit├Ąt Bonn, Germany
Abstract. Laboratory experiments have confirmed that the application of uniaxial stress on rock samples is accompanied by the production of weak electric currents, to which the term Pressure Stimulated Currents – PSC has been attributed. In this work the PSC emissions in amphibolite samples from KTB drilling are presented and commented upon. After having applied sequential loading and unloading cycles on the amphibolite samples, it was ascertained that in every new loading cycle after unloading, the emitted PSC exhibits lower peaks. This attitude of the current peaks is consistent with the acoustic emissions phenomena, and in this work is verified for PSC emissions during loading – unloading procedures. Consequently, the evaluation of such signals can help to correlate the state and the remaining strength of the sample with respect to the history of its mechanical stress.

Citation: Triantis, D., Anastasiadis, C., Vallianatos, F., Kyriazis, P., and Nover, G.: Electric signal emissions during repeated abrupt uniaxial compressional stress steps in amphibolite from KTB drilling, Nat. Hazards Earth Syst. Sci., 7, 149-154, https://doi.org/10.5194/nhess-7-149-2007, 2007.
Publications Copernicus
Download
Share