Numerical Simulation Of Karst Water Inflow Quantity For The Shanxi Dafosi Wangyuan Coal Mine

Coal resource is the foundation of industrial development.In recent years,with the development of industry, coal production is increasing, leading to thephenomenon that the shallow coal is worked out and the deep coal is largelymining,which is strongly influenced by the high-pressure from the karstgroundwater.The article takes shanxi Dafosi Wangyuan Coal Mine as an example, and itis necessary to reduce the water level to a safe level because of the regional karstwater pressure and complicated hydrogeological condition.Taking the karst water inflow in coal mining as the research object and thehongshan spring.as simulation range,and specific idea is as follows: at the basisof a lot of field investigation and data collection, doing the analysis to theregional hydrogeological conditions, spring field water balance elements, thekarst aquifer water, karst medium fracture condition, geological structure and theway of mine water filling factors of Hongshan Spring, to put forward thehydrogeological conceptual model and a generalized boundary scheme. Finally,to establish a double-layer structure, inhomogeneous isotropic and unsteadythree-dimensional groundwater flow system.Use the finite difference method, inputting discrete grid and initial waterhead, hydrogeological parameters, boundary conditions and so on, through themodel identification and parameter inversion of software function, debuggingout of accord with the actual hydrogeological parameters, through theexperiment verifies the fitting level, eventually establish a realistic karst water inflow forecast model by GMS.+500,+450of NO.10coal,+580,+500,+450of NO.11coal are the fivemining levels to predict,On the basis of this model, combining with thepreliminary design and the development and utilization of coal mine and thewater inrush coefficient determined calculated determine the safety miningwater level value of the five levels and hydrophobic drop of karst water, finallyput forward several kinds of hydrophobic solution, comparing different affectsof the time, scanty rainfall and hydrophobic reduction behavior to the quantityof water of Hongshan Spring. providing scientific basis for domain of waterresources, the safty of coal mining production, reasonable arrangement ofdrainage device,protection of water quantity in HongshanSpring domain.