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采用三维矢量有限元法对地下巷道进行了三维数值模拟,并使用全域视电阻率定义方法对正演模型进行了计算,绘制了地下巷道的视电阻率分布断面图,为实测数据的解释提供了比对依据.构建了无人机电性源地空瞬变电磁探测系统,使用该系统在南京六合区冶山开展了地下巷道探测实验,并对实验数据进行处理分析,实验结果与数值模拟结果吻合度较高,验证了该系统探测的有效性和准确性,为无人化地空探测系统的改进提供了新方法,也为该系统在资源普查、矿产探查等民用领域以及军事领域上的应用提供了新思路.
The three-dimensional numerical simulation of the underground roadway is carried out by using the three-dimensional vector finite element method. The global apparent resistivity definition method is used to calculate the forward model, and the apparent resistivity distribution cross section of the underground tunnel is plotted, which provides the interpretation of the measured data Based on the comparison, the transient electromagnetic detection system of UAV ground source was constructed, and the underground tunnel detection experiment was carried out in Yehe, Nanjing Liuhe District by using this system. The experimental data were processed and analyzed. The experimental results were in good agreement with the numerical simulation results The validity of the system detection is verified, which provides a new method for the improvement of the unmanned ground-based sounding system. It is also used in civil and mineral exploration such as resource census and mineral prospecting. Provide a new idea.