Abstract: In order to avoid lacking of awareness and usage of the process of water inrush, drainage test of mining water inrush on site were studied under complex geological condition on the base of a comprehensive analysis of the background field near the water inrush point and risk assessments. Re- sults show that the process of mine inrush water under certain conditions can be successfully used as drainage test, and some following roles can be gained such as determining the water source, revealing hydrodynamic process, calculating hydrogeological parameters, and revealing the Karst medium condi- tions and reasons for water inrush, and so on. The new method has been carried out to get access to hy- drogeological information which was difficult to get using routine methods, providing important scien- tific data for analyzing water inrush reasons, and dealing with efficiently water inrush disaster.

Key words: water inrush, draining test, hydrogeological meaning, background fields