Numerical Simulation Research Of The Influence Of The Sima Coal Mining To The Aquifer

Sima Minefield is located in the southeast of Luan mining area.The whole mine area is covered by Quaternary loess.The groundwater in Quaternary Alluvial-diluvial pore aquifer is the main domestic and productive water for the people in the mining area.Sima Coal Mine is currently mining 3~#coal seam,3~#coal distributed in the whole area,for the whole area can be mined,the thickness of coal seam is large,3~#coal mining after the completion of the water conduction fracture zone development height 97.87~181.42 m.Quaternary porous aquifer is developed in the eastern water-conducting fracture zone of the minefield,and K10 sandstone aquifer is developed in the Western water-conducting fracture zone,which is bound to cause catastrophic damage to the overlying aquifer,especially the Quaternary aquifer which the people of the mining area depend on.Therefore,it is of great significance to study the influence of coal mining on Quaternary aquifer.In this paper,groundwater dynamics as the principle,numerical simulation as the research means to protect groundwater resources for the purpose,through the collection and analysis of hydrogeological survey materials,the main aquifer and the main mining seam,the main aquifer space relations,aquifer recharge,runoff,discharge conditions.Taking the Quaternary unconsolidated aquifer as the research object,the hydrogeological conceptual model and mathematical model are established,and the Quaternary pore water flow field and water level are predicted after the mining of No.3 coal.The results show that the Quaternary pore water in the thin loess area in the southwest and middle of the minefield is less affected after coal mining.The Quaternary pore water in the thick loess area of northeast China is affected by coal mining.The water level is decreasing year by year.The water level varies within 11m in 2000 days.