电性源发射端接地电阻的理论计算及影响因素分析

The Theoretical Calculation of the Grounding Resistance to Electrical Source and Its Affecting Factors Analysis

在电性源电法勘探中,发射端通常需要布置接地的长导线,同时需要确定供电电流的大小。如果接地电阻过大,就会导致供电电流太小。因此需要了解如何布置接地电极才能有效的降低接地电阻。本文从满足的稳定电流场理论出发,将大地视为半空间均匀无限介质,在计算不同形体接地电极的接地电阻的基础上,分析了接地电阻的影响因素,总结和提出了降低接地电阻的方法。

As to the electrical source method, the grounding long wires are usually decorated at the transmit- ting terminal, and the size of the current power also needs to be determined. If the grounding resistance is too larger, it will make the current much smaller. Therefore, it is necessary to know how to lay the ground electrode to reduce grounding resistance effectively. Based on the knowledge of the dc magnetic field, we treat the earth as a half-- space homogeneous infinite medium, and calculate the grounding resistance of grounding electrodes of different shapes. Then the impact of grounding resistance factors is analyzed, and al- so the method to reduce grounding resistance is proposed here.