Numerical Simulation Of Mine Discharge Of Excavate Coal On Level Two In Taiyuan Xiyu Coal Mine

Mine discharge is the inflow water of unit time flowing into mine during the process of mine production and mine construction. It is the main gist of determining the drainage facilities and prophylactico therapeutic measures of water for department of mine designing and is also one of the key indexes to estimate the complexity of hydrogeology condition. Mine discharge is the keystone safety to solve in mining production and mine construction. Forecasted the mine discharge exactly have important meaning for preventing mine water inrush,mine flooded and other malignant mine accidents. It also has important meaning for reducing production cost and ensuring safe production. The paper discussd the matter with the study area of Xiyu mine in Taiyuan according to realize the internal and overseas forecasting mine discharge.The paper's study object Xiyu coal mine is one of the main mine in Shanxi, located the southwest of Taiyuan, it's acreage about 10.5 km2. The upside coal measures of level one and level two had been mined, now mine the midst and underside roundly. The level two's water table is 650m, the depth mostly under 700m, the lowest is about 430m. Ordovician's water is the main water of the first indirect soleplate overflow, fengfeng's water is not easy to discharge, and it's static state water level also higher than level two. The exploitation of level two is under press, the mine of midst and underside has the danger of overflow. Especially at the place of complex condition and rupture. It's the type of midding-complex. Therefore forecast the mine discharge of fengfeng to ensure mine work can process successfully, set down the measure logically to prevent the overflow.The paper analysed the hydrology, weather, landform and physiognomy, analysed hydrogeology condition, ploted parameter, established mathematical model by Visual Modflow. Checked parameter and model based on data of pump test, to make sure the mathematical model and real model conformed, advanced usability and veracity. Adopt the numerical simulation to forecast the mine discharge .Gain the safe water level by excess modulus, charge mine discharge make sure that the water table under safe water level. Forcast the mine discharge in normal rainfall, more rainfall and less rainfall when they are under safe water table.