Prediction The Water Inflow Of MinDong 2 Coal Mine Based On MODFLOW

The study area is located in the northern Mindong district within the scope of the right of exploration and mining field area is 116.5 Km2.In this paper, guided by the theory of hydrological geology, groundwater dynamics, combined with the regional geological data of the Inner Mongolia hailar, through the pumping test, water quality analysis and sedimentary analysis, we have a study including: the divided of aquifer and anquifge, hydrogeology condition, water-rich character of the Mindong district.In this paper the research area is divided into two main aquifer groups: quaternary pore aquifer and cretaceous Yinmin coal aquifer, and the later is further divided into 15 coal seam in upper aquifer, 15 coal seam in aquifer, 16 coal seam between the upper aquifer, 16 coal seam aquifer.Each aquifer the water-abundance is better., upper anquifge layer is uneven, and waterproof effect is poorer.The 15 coal seam in the coal strata aquifer aquifer is the focus in the study of the aquifer.14 anquifge layer of coal seam and quaternary anquifge layer which overlap it,are uneven,have head difference, the edge has skylights and supplies;the underlying 15 anquifge layer of coal seam which is uniform distribution and water content is weak, for good anquifge layer.Paper on the basis of the hydrogeological conditions analysis, generalized the hydrogeological conceptual model of Mindong 2 mine, established the mathematical model corresponds to the hydrogeological conceptual model, finally using Visual Modflow numerical simulation, calculates the first level of mine water inflow is 1943 m3 / h, maximum groundwater discharge is 2137 m3 / h;Advanced mining district normal water inflow is 1757 m3 / h, maximum water inflow for 1933 m3 / h.We give a suggestion for the mine mining drainage drainage scheme,according to the results of numerical simulation.