The Experimental Study on Rock Resistivity
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摘要: 本文首先概述岩石在室内各种受载条件下电阻率的实验研究工作,这对于认识和理解电阻率变化特征、规律以及探索其机理起着重要的作用。但是在实验中主要采用4个固定电极的测量系统,它只能获得从某个深度到岩样表面的整个深度层的视电阻率变化的综合信息,而无法获得不同深度层的视电阻率变化特征,不利于进一步研究电阻率及其各向异性变化的机理。我们利用电阻率层析成像方法获得了多个方向的电阻率数据,据此可以获得随深度变化的电阻率及其各向异性曲线以及随应力变化的电阻率图像,可能为深入理解和研究电阻率变化机理起到积极的帮助。Abstract: This paper first summarizes the indoor experiment of rock resistivity under various loading conditions and outdoor research work of rock resistivity. These researches play an important role on understanding the change characteristics and laws of resistivity and exploring its mechanism. However, they mainly adopted the measurement system of four fixed electrodes in the experiment which can only acquire the comprehensive information of apparent resistivity change from a certain depth to the surface of the sample, and it cannot obtains the change behavior of apparent resistivity of different depth layers, which is conductive to further study the resistivity and its change mechanism of anisotropy. We acquire the resistivity data of different directions using electrical resistivity tomography, they can help us to get the changing resistivity and the anisotropy of resistivity curve with depth and to obtain the resistivity change images with stress, which may play a positive help on deeply studying and understanding the resistivity change mechanism.
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Keywords:
- resistivity /
- resistivity anisotropy /
- load /
- electrical resistivity tomography
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