Abstract: In the detailed hydrogeological work of Shimangkeng Gold Mine，the methods of steady flow pumping and water injection are used to obtain the permeability coefficient of the aquifer respectively. By analyzing the difference between the two test results，a reasonable permeability coefficient is deter⁃ mined，which provides a basis for the prediction of water inflow. The reasons for the large difference in per⁃ meability coefficient are the small amount of water，the short duration of pumping，and the inconsistency of test sections. Referring to the empirical value of the permeability coefficient of sandstone and siltstone，the permeability coefficient of the water injection test is selected，and the large-well method is used to predict the mine water inflow，and the calculated mine water inflow is 166 m³/d.

Key words: pumping test, water injection test, permeability coefficient, water inflow prediction