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Numerical Simulation and Prediction of Karst Water Dewatering Flow in Pingyu 1st Coal Mine, Henan Province

Author: TangHui
Tutor: PanGuoYing
School: Henan Polytechnic University
Course: Geological Engineering
Keywords: Dewatering flow field Hydrogeological conditions Drainage test Visual Modflow
CLC: P641.2
Type: Master's thesis
Year: 2011
Downloads: 84
Quote: 0
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Abstract


Ping Yu coal miners mining company a two 1 coal and two 3 coal seam floor distribution of Carboniferous limestone and thin thick Cambrian limestone karst fissures , rich in karst water , rich in water strong pressure head high , often occur during coal mining water inrush accident has happened four times in history the cold gray water suddenly flooded wells or flooded mining area . As the mining depth increased, the role of the karst water pressure in coal seam floor increases , water inrush greater risk. After reviewing relevant literature analysis , based on the combined years of hydrogeological data mining , Ping Yu a comprehensive analysis of geological and mining hydrogeological conditions , the design and conduct of the sparse gray karst put cold water test , to fully understand the Ping Yu Ida cold gray karst water recharge and discharge runoff conditions, and put cold karst Water sparse degree of difficulty . Formed by using the drainage test dewatering karst water flow field and the dynamic water level observation wells , etc., using correlation analysis to predict the future sparsely placed under water inflow . And turn on the water on the basis of experimental data , the use of internationally accepted , standardized groundwater numerical simulation software Visual Modflow Ping Yu established a mine groundwater flow simulation model . After model validation and parameter identification, numerical simulation model to establish realistic hydrogeological conditions , stable and good reliability . Application of this model to predict when the next release of water to increase the sparse karst water flow . Prediction results show that, with further increase mine sparse water , groundwater negative equilibrium , karst water level continued to decline , to form a three mining areas and technological well as the center of drain hole drawdown funnel . Mines in the discharge of water, 4880m 3 / h in the case , continue to drain a funnel in the center allows the water level dropped to about -50m .

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CLC: > Astronomy,Earth Sciences > Geology > Hydrogeology and Engineering Geology > Hydrogeology (groundwater hydrology ) > Groundwater Dynamics
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