Abstract: In order to understand the hydrogeological classification of coal mines in North China and the current situation of water hazards, data were collected, i.e., the number of coal mines, mine water inflow, water discharge, water content coefficient, the hydrogeological classification, and the level of effort in preventing and controlling the water hazards. The situation and characteristics of the hydrogeological classification in North China’s coal mines were studied statistically. There are 41 extremely complex coal mines, 299 complex coal mines, 1585 medium coal mines and 964 simple coal mines. Analysis of the 2012 and 2013 water hazard accidents in North China’s coal mines indicates the water hazards often occurred in state-owned mines and were mostly caused by goaf water. The effort will help the future job in water prospecting and dewatering and ascertain the important areas for preventing and controlling of water inrushes.

Key words: coal mine, hydrogeological classification, 2012～2013, the major water inrush accident