Study On Groundwater Drainage And Hydrogeology Ormation System Management In Dongming Coal Mine Hulunbeier City

Groundwater drainage is one of the key technology for Open-pit coal mine. This articleuses field investigations, field pumping test, theoretical analysis and numerical simulationtechnology for In-depth study on the mine hydrology geological condition. Including maingeological features, strata in mining areas, hydro-geological conditions and distributioncharacteristics of coal seam。In-depth studies on Hydrogeological boundary、Groundwaterconditions and Production progress of Open-pit coal mine，After a reasonable generalization，Established a three-dimensional hydro-geological modeling，Quantitative study on two majoraquifer in Mining areas，Theoretical analysis of Curtain closure programme， AssessDewatering and drainage， Main use Field testing, Theory calculation and numericalsimulation technology Evaluation and design on drainage in the mining area。The first Part, By region hydrogeological condition and pumping test results, combinedwith the empirical formula obtained and Theis formula of hydro-geological parameters，Including Permeability coefficient（K）、Pressure transmission coefficient（a）、Waterconduction coefficient（T）、Water supply（μ）、Elastic storativity（μ*），According to theWater resources quantity and Water inflow of mine。Evaluation of dynamic characteristics ofgroundwater and Design drainage programme。Including The principle of well distribution、Well completion requirements and Drainage requirements and so on，Reasonable layout ofpumping well，Through the " External closure and Internal drainage " reached the purpose ofprecipitation.The second part, on the basis of the pumping test, hydrogeology survey and formation,established the1km x1km local mining area hydrogeological model, it can be predicted, andaccurately determine the parameters of mining area hydrogeological, predict partial miningarea under different operating conditions the flow field evolution.The third part, according to he hydrogeology model of local mining area t, we furtherset up reasonable underground flow field numerical model to verify the whole of the miningarea precipitation design.The fourth part, according to the measured data of rainfall effect verification, andestablish the mining area hydrogeology information visualization management system, according to rainfall in the project of hydrogeology information, component correspondingdatabase, and applied in the mining area, and the result is good.