Hydro-geological Characteristics and Controlling Measures of Yangqu River Coal Mine

Yangqu River Coal Mine is located in the hydrogeological unit of the east of Gu Mountain. The groundwater system in this Mine includes quaternary pore aquifer group, fissure aquifer group of coal bed rock, fissure-karst aquifer group. The main aquifers include Shihezi sandstone confined aquifer, Middle Ordovician limestone fractured karst confined aquifer and the Upper Carboniferous in Taiyuan Formation thin-bedded limestone confined aquifer. The former is the main source of water-filled mine, and the later is the main aquifer to threat mining. The analysis of inrush water risk in 6# layer of Coal Mine determined the minimum elevation with pressure of exploitation. Through drainage experiments in Ordovician aquifer, mining methods are explored which are mining with pressure or mining with reducing the pressure in the “last three layers”. Through dynamic analysis of water quality in the coal mine, grasp the changes of aquifer salinity, and infer the natural recharge conditions in the aquifers. Detect water-rich region in advance for good hydrogeological forecast.