Detection Of Water Condition And Risk Assessment Of Floor Water Inrush Of 16 Coal Mining In The Area Under The Lake Deep Of Binhu Coal Mine

With the gradual depletion of shallow coal resources,the mining depth of the mine continues to extend downward,and the mining difficulty gradually increases,especially the mine water disaster.In recent years,the North China type coal field is threatened by the Ordovician limestone water on the floor,and water inrush accidents occur frequently.Binhu Coal Mine in Tengzhou coalfield,Shandong Province,is a typical North China type coalfield.Influenced by the confined water of Ordovician limestone on the floor,water inrush has occurred many times,which has affected the efficient and safe production of the mine.Therefore,in-depth study of the deep hydrogeological conditions of Binhu Coal Mine and the risk assessment of water inrush from Ordovician limestone are of practical significance for the prevention and control of mine water disasters in North China type coalfields.This paper takes the lake-deep area of Binhu Coal Mine in central and western Tengzhou as the research object,and makes a detailed study and evaluation of the ash rich water situation in the lake-deep area of 161 West Mining Area and the water inrush problem of the 16 coal mining floor.In this paper,the hydrogeological characteristics of each aquifer in the study area and the conditions of runoff compensation and drainage are analyzed,the factors of water filling in 16 coal mining are summarized,the characteristics of mine water inflow are analyzed,and the water inflow is predicted by using the large well method and the analogy method.According to the characteristics of complex surface conditions and large depth in the study area,the west mining area 161 of Binhu Coal Mine is constructed by using the high-resolution 3D seismic exploration technology The water condition of Ordovician limestone is detected by a variety of geophysical methods,such as transient electromagnetic detection,underground high-density two-dimensional and three-dimensional electrical exploration,and the water rich abnormal areas of many roadways and working face floor are delineated.Based on the comprehensive analysis of water inrush influencing factors such as aquifer water yield,effective thickness of aquiclude and fault,the "water inrush coefficient method" and "water inrush index method" are used to evaluate the water inrush and divide the risk area in the study area.The engineering practice proves that the result of division and classification is more accurate.