The preventing and contoplling water hazards in small coal mines in coal fields of Yima coal mining (Group) Co.Ltd.

Abstract：Taking the Yima Coal Mining (Group) Co.Ltd.as an example, the paper summarized the hydrogeological condition of the state?owned coal mines and the distribution of the small coal mines in the coal fields and analyzed the water hazards and the economic loses caused by the small coal mines.It puts forward the effective measures of preventing and controlling water hazards caused by small coal mines.And points out that the most effective measures is stopping the illegal mine's mining.

Keyword：small coal mines;hydrogeological condition;preventing and conrolling water hazards;