Huoqiu County, Lee F, Iron Ore Pit Inflow Forecast

Lilou iron ore of Mining Development Co. Ltd. in Anhui is in Huoqiu county , Iron ore reserves 276.2482 million tons. Mine infrastructure began in October 2003. Because the geological and hydro-geological study of mine is poor ,so it bring hidden dangers to safety production of mine. Studying the characteristics of the groundwater system of the mine area and forecasting mine discharge is provide a scientific and rational baisis for the planning of mine production development, made some feasible suggestions for preventing mines vicious incidents ,for examle mine water burst, submerged wells and ect.This paper depthly analysised the hydrogeological conditions of the mine area, detailed the basic characteristics of groundwater system of the mine area ,researched the reasons of deposits of water-filled ,water-filled channel and the impact of water-filled intensity of the various factors, established the model of hydro-geological study area concept models and mathematical models;based on the finite difference method ,used the numerical simulation software of modflwow to establish numerical model of groundwater system and calculated the mine discharge of -200 meter mining in mine area , put forward the prevention and cure water measure that ground mine.Research shows :①The main movement of groundwater of mine is alternationg vertical movement.The depth of mine drainage system is -200 meters .The water of deposits comes from groundwater of quaternary. Bedrock construction fracture zone is the channel of Water-filled. At the bottom of quaternary impacts water-filled of deposits. The movement of groundwater of mine is the three-dimensinonal movement. Vertical pressure of groundwater system is very tremendously.②Forecasting mine discharge of -200 meter mining by the mothed of numerical : the average of mine discharge in the period of infrastructure development is 18924m~3/d ; the average of mine discharge in the period of mining is 18924m~3/d . The result of forecasting can be used to the basis of mine design.The paper has made a meaningful attempt on the numerical simulation of groundwater three-dimensional flow by researching the numerical simulation of groundwater system of Liulou iron ore .It not only provides the scientific basis for building of mingning area , but also provides the reference model for researching groundwater system of similar mining area.