基于全空间模型，研究了井下瞬变电磁法的数据处理方法，依据实测煤层资料建立全空间地电模型，并采用时域有限差分法模拟充水采空区全空间瞬变电磁响应。结果表明，视电阻率等值线的低阻区能准确反映采空区的富水情况，利用井下瞬变电磁法对马家岩煤矿采空区富水性进行了探测，探测结果与实际结果一致。

Based on the full-space model, the data processing method of underground transient electromagnetic method was studied. The full-space earth-electricity model was established according to the measured coal seam data, and the full-space transient electromagnetic response of the water filled goaf was simulated by the time domain finite difference method. The results showed that the low resistance area of the apparent resistivity contour line could accurately reflect the water abundance situation in the goaf. The underground transient electromagnetic method was used to detect the water abundance of the goaf in Majiayan Coal Mine, and the detection results were consistent with the actual results.