Abstract: The existing of roadway space will affect the distribution of current field around it. For fluctuation tunnel, based on ANSYS, an advanced detection 3D ground electric model of the mine roadway was established to carry on ANSYS forward. It was conclude that the fluctuation tunnel caused the apparent resistivity minimum and abnormal range decreased, but did not change the location of the apparent resistivity minimum, especially the inverted V-shaped roadway effect. For the interpretation of the measured data, the fluctuation tunnel is just one of the influencing factors of roadway. Consequently, in order to improve the interpretation accuracy, multi-parameter should be taken into account.