Geoelectric analogue modelling experiments to detect fissure directions in multidirectional fissure systems

S. Szalai, I. Kósa, T. Nagy, L. Szarka

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Water and pollution transport takes places in fissures, and fissures may also reduce the stability of the rock body. Therefore, fissures in rock are an important issue, especially in case of multi-directional fissure systems, where the situation is more complicated.The so-called azimuthal technique, by using the Schlumberger array is a routinely applied method in geoelectric fissure detections. As we demonstrate it by using analogue model measurements, this method has several shortages. In absence of a priori information, the fissure directions could be obtained only in 60% of the total cases with a precision of ±10%. We have also demonstrated that the effectivity of the method becomes even worse, when the covering sediment layer is thicker. At the same time, when we simply rejected the anisotropy paradox, it was found, that the effectivity of the method is increasing with increasing sediment thickness. The original azimuthal technique is based on the generally accepted hypothesis of the so-called geoelectric anisotropy paradox. The analogue modelling results have made clear that the critical point of the method is the application of the anisotropy paradox. The fissure directions can only be determined, if the conditions of the anisotropy paradox are clearly defined. However, having more than one fissure directions, statistically these fissure directions can be correctly determined.

Original languageEnglish
Pages (from-to)137-147
Number of pages11
JournalActa Geodaetica et Geophysica Hungarica
Volume45
Issue number2
DOIs
Publication statusPublished - Jun 1 2010

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paradoxes
fissure
Anisotropy
analogs
anisotropy
modeling
Sediments
sediments
pollution transport
experiment
Experiments
Rocks
rocks
critical point
Pollution
coverings
analog model
sediment thickness
water
Water

Keywords

  • Analogue modelling
  • Anisotropy paradox
  • Azimuthal geoelectric measurements
  • Fissure direction determination
  • Pluri-directional fissure system

ASJC Scopus subject areas

  • Building and Construction
  • Geology
  • Geophysics

Cite this

Geoelectric analogue modelling experiments to detect fissure directions in multidirectional fissure systems. / Szalai, S.; Kósa, I.; Nagy, T.; Szarka, L.

In: Acta Geodaetica et Geophysica Hungarica, Vol. 45, No. 2, 01.06.2010, p. 137-147.

Research output: Contribution to journalArticle

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