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应用钻孔法测量地壳中应力的相对变化,其中一个重要环节,就是通过元件测值变化计算测区应力的变化。这种定量计算需涉及若干力学问题,然而现有的一些地应力台站,在这些方面存在着不同程度的缺欠。针对这种情况,就需要一种定性判别测区应力的方法。 当前多数地应力台站,是根据材料的压磁效应测定元件电感值的变化以确定测区应力变化。而元件电感值的升降,直接取决于钻孔孔壁对元件两端的作用力。由于元件与孔壁间存
One of the most important steps in the measurement of relative changes in stress in the earth’s crust using the drilling method is the calculation of the change in stress in the survey area by measuring changes in component values. This quantitative calculation involves a number of mechanical problems. However, some existing stress stations have different degrees of deficiencies in these aspects. In response to this situation, we need a qualitative method to determine the stress zone. At present, most of the earth stress stations change the inductance value of the component according to the piezomagnetic effect of the material to determine the change of stress in the survey area. The rise and fall of the component inductance depends directly on the hole wall of the component on both ends of the force. Due to the components and hole wall deposit