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本实验是在室温条件下对兰州河口砂岩进行了单轴加载,在与加载方向平行、垂直和成45°角的方向上观测了电阻率的变化特征。主要的实验结果是: (1)垂直层理加载时电阻率ρ_(?)(平行于加载方向)和ρ_(?)(垂直于加载方向)的变化分为三个阶段:上升—平稳—下降。(2)平行层理加载时电阻率ρ_(?)和ρ的变化表现出明显的各向异性。不论平行或是垂直层理加栽,在与层理面45°角的方向上的电阻率变化均较小。本文还对上述结果进行了定性解释。由于这种砂岩的放大因子较小(10—10~2),所以不适宜做地电台址。
In this experiment, the Lanzhou estuary sandstone was uniaxially loaded at room temperature, and the resistivity characteristics were observed in the directions of parallel, vertical and 45 ° to the loading direction. The main experimental results are as follows: (1) The changes of the resistivity ρ _ (?) (Parallel to the loading direction) and ρ_ (?) (Perpendicular to the loading direction) during vertical bedding are divided into three phases: ascending-steady- . (2) The change of resistivity ρ_ (ρ) and ρ in parallel bedding shows obvious anisotropy. Regardless of the parallel or vertical bedding, the resistivity in the direction of the 45 ° angle to the bedding face is small. This article also qualitatively explained the above results. Due to the smaller amplification factor of this sandstone (10-10 ~ 2), it is not suitable to do radio stations.