Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: rock electric resistivity

Sortuj według:

Ogranicz wyniki do:

Quantitative modeling of rock electrical resistivity under uniaxial loading and unloading

Qu Chuanqi, Yiguo Xue, Su Maoxin, Qiu Daohong, Ma Xiaoyin, Liu Qiushi, Li Guangkun

Acta Geophysica

2024

Vol. 72, no. 1

195--212

In geotechnical engineering practice, studying the characteristics of rock electrical resistivity under different physical and mechanical environments is important for improving the accuracy of unfavorable geological condition detection. In this study, Dali marble and granite were subjected to cyclic loading and unloading at different peak pressures, and the electrical resistivity of the core samples was continuously monitored. The aim was to derive the electrical resistivity variation patterns of two rocks under cyclic loading and unloading. Then, the theoretical models of electrical resistivity for the two rocks were established through theoretical derivation, and the model equations were consistent with the experimental findings. Finally, a MATLAB program was used for nonlinear fitting of the unloading phase electrical resistivity variation patterns of the rocks to reveal the quantified pressure-electrical resistivity patterns of the two rocks with different lithologies. Based on this, well-performing rock pressure-electrical resistivity relationship models were developed with three parameters: pressure, water content and electrical resistivity. The experimental results can significantly improve the accuracy of stratigraphic state inversion and unfavorable body boundary identification by providing realistic electrical resistivity constraints for electrical resistivity tomography.

Numerical simulation of resistivity changes caused by water infiltration

Teisseyre K., Teisseyre R.

Acta Geophysica Polonica

1999

Vol. 47, nr 1

41-57

The paper presents a method of calculation of electric resistivity (including anisotropy) for a compound medium with cracks/inclusions infiltrated by fluid. A comparison with other similar models is made. An application for an analysis of water infiltration and the resistivity changes in bedrock of the Czorsztyn-Niedzica water reservoir is discussed.