Numerical Simulation Of Water Inflow In The 3085 Working Face Of Donghuantuo Mine,Kailuan

The influence of coal mining on groundwater is dynamic and continuous,destroying the primary aquifer,changing the balance of groundwater recharge,discharge.Analyze the hydrogeological conditions of water filling in working face and predict the mine water inflow is significance to ensure the green safety production of the mine.The 3085 working face of Donghuantuo Mine is the research object,comparing the lithology of strata within the roof fissure zone of the face,tiering according to the results of the comparison.The hydrogeological properties of the working face are analyzed.The three-dimensional numerical model of groundwater seepage in the working face of 3085 is set up by using the Visual Modflow.Through equilibrium calculation,the water inflow of working face is predicted.Based on the seepage model,the design optimization of advanced hydrophobic drilling is discussed.The results show that the top strata in the 8 mining water-guide slit are divided into 27 layers,the 7 layers of the rich aquifer with coarse sandstone as the main,the 4 layers of the aquifer with fine sand and siltstone as the main,the 10 layers of the weak aquifer with siltstone as the main,the 6 layers of aquiclude with coal and mud shale as the main.The main stream of water in the work is from the third,the seventh and the fifth aquifer.Different parameters are assigned to each laye,a practical model is established.It is predicted that the dynamic curve of the water inflow time is the stable,and the prediction result is close to the actual value,indicating that the model is scientific and reliable.Before mining,the amount of drilling water decreases with the time step.The hydrophobic drilling hole is arranged in the main water-bearing layer,and the position of the lower-lying point of the water-bearing layer or the accumulated thickness of the water-bearing layer is larger,and the effect of the hydrophobic.Figure 37;Table 14;Reference 60...