The Dynamics And Characteristic Of The Underground Water In Yushenfu Coal Mining Area

YuShenfu area is located in north of Shaanxi province, which is belongs to the arid and semi-arid continental monsoon climate. The area is one of the national mineral resources and fertile regions. The coal mining is became a local leading economic pillar industry. With the mining of coal, the hydrogeological environment of groundwater is being destroyed, the structure of geological and hydrological are changed, then the rivers are dried-up, the geological come to collapse. So study on the dynamic characteristics of groundwater in YuShenfu coal mining area, is to find out the influence law of coal mining in different stages of groundwater, and then provide a scientific basis for predicting the future dynamic changes of groundwater.The YuShenfu coal mining area is as the research object, statistics the data is to the relationship with surface runoff, the springs flow, the mine water level and vegetation ecosystem, is to analyzing water level decreased sharply with a directly relationship in the coal mining. Before and after the changes of coal mining geology,stratum,and the mine inflow,which is deeply analyzing the effect of coal mining on groundwater dynamic. Coal mining can form draw-down funnel area, goaf formed mine water by water, and the underground water level is sharply decreased. As the coal mine is stopped and mine drainage ended, the water balance has no longer to exist, groundwater movement formed a new dynamic flow.The effect law of dynamic change in Long-term groundwater is studied on coal mining,which is as an example to Jinjie mining area. Then the model of conceptual hydrogeology is been built, the groundwater numerical simulation is been established. The groundwater level are declined about 20 m a year on average in Jinjie mining area, until the water comes to balanced, the funnel presents a steady state in 2048.