Numerical Simulation Of Ningxia Coal Mine Roof Of Groundwater

The mine is located in the eastern part of Ningxia Hui Autonomous Region, Field covers an area of 85 km2. The mine is the main aquifer water filling Zhiluo Sandstone Aquifer and 2 to 6 of the mine aquifer water.This thesis mainly to the 2 coal roof aquifer water groundwater modeling.In this thesis, by collecting, collating data mining survey work boreholes and hydrogeological data, analysis mine stratigraphic features, let us to the mining area have a overall understanding of the formation and aquifer. Then, split the East and West of the cross-section can clearly display three-dimensional model of the hydrogeological structure of all the details inside. Hydrogeological model of the three-dimensional analysis, the use of “Numerical Methods” 2 for coal mining area Zhiluo roof sandstone aquifer under the Mine Inflow forecast rainfall sparse Finally on better solutions.This thesis consists of fife chapters, the first chapter introduces the research significance and background, analyzing and summarizing the current research status in this field, and briefly describes the content of this study and technology roadmap; The second chapter presents the general situation in the study area, mainly including the location of the study area, topography and geomorphology, survey, etc.; The third chapter, including mine geology and hydrogeology, including the formation, structure, and characteristics of the aquifer, aquitard, groundwater recharge, runoff and discharge conditions; fourth and fifth chapters are the core of this paper, through the mine hydrogeological analysis and collation of data, using Visual MODFLOW software to build pit mining area groundwater numerical simulation model, the feasibility of the model was verified after repeated run and test the model, mine water inflow to the mining area to predict, and ultimately make better the sparse precipitation scheme.‘Dimensional flow numerical methods’ in the natural state of normal water inflow forecasting coal seam roof is 1700 m3 / h, maximum water inflow is 2482 m3 / h,;engineered state in seam roof water inflow forecast for 1870 m3 / h, maximum water inflow to 2730.2 m3 / h.