Microseismic Early Warning Method of Water Inrush in Coal Mine Floor Facing Different Time and Space
In order to solve the problem of early warning of water inrush disaster in coal mine floor,a warning method for different time and space based on microseismic monitoring was proposed,which solved the problem that traditional early warning could not fully cover different spatiotemporal working face.Based on the borehole and microseismic data of 1108 working face,2D-CE(Two-Dimensional Cumulative Energy)method and nuclear density analysis were used to improve the mine warning accuracy.The results showed that in the advanced mining period,the advanced bearing stress affected the low resistance zone,the microseismic frequency was high but the energy was small,the inclination angle of the microseismic ellipse increased to 8.5°,and the microseismic ellipse had penetrated the L8 aquifer,but has kept a distance from the L2 aquifer.The method improved the accuracy of water inrush prediction,and can provide reference for water damage prevention in similar mining areas.
microseismicwater inrushdifferent time and space1108 working face floorearly warning method
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