Modelling of anisotropic resistivity changes caused by stresses

K. P. Teisseyre


This paper examines the existence of oriented crack systems in the rock medium under stress load and its influence on the resistivity of the medium. Electric resistivity in the presented model depends on the rock frame's resistivity and on the influences of all the systems of cracks. In the assumed model, in the medium two or more crack classes can coexist, for example filled with gas and with aqueous solution. Examples of numerical simulations are compared to results from measurements in the laboratory and in the field í during monitoring of earthquakes and mining shocks. The relevance of this model to rock state surveying is discussed


electric anisotropy;resistivity;rupture preparation

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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X