Abstract: Mine water disaster has become one of the main hazard sources of underground mining be⁃ cause of its sudden and dangerous. In view of the fact that the resistivity of mine water is lower than that of surrounding rock，the mine transient electromagnetic method is used to observe the distribution range of water body in front of excavation. The geoelectric sections in the elevation angle，bedding direction，de⁃ pression angle and vertical direction of the tunneling face are detected respectively，and the low-resistance abnormal area in front of the tunneling face is displayed in three dimensions. The inversion results show that the mine water at different angles in front of the heading face is close，the range distribution is large， and the right side water damage is more serious than the left side. The advanced prediction of water damage in electromagnetic roadway excavation has achieved good results，which can provide a reliable reference for subsequent excavation work.

Key words: mine water, low resistance region, advanced prediction, transient electromagnetic method