In order to discuss the water inrush mechanism of a seam floor under conditions of deep mining depth and high pressurized water,with an analysis on the floor water inrush features of Hanxing Mining Area,from a study on the rock structure,underground water dynamic,linear elastic fracturing and other mechanics,the paper firstly provided the water inrush mechanism of the seam floor with ＂ time sections and divided zone breaking＂. From the space,there were four water isolated geological elements divided the aquifer in the thin limestone between the No. 2 seam of the main mining seam in the top group seam and Ordovician limestone aquifer of the coal measure floor. Based on the water resistance capacity,the floor rocks of the seam were divided to 11 water resistance ＂ subzones＂,there were six floor water inrush models established and the material basic conditions to make the high pressurized water breaking through each zone from bottom to the top were interpreted. From a view of the time,the process to form the seam floor seepage and water inrush channel was divided to four ＂ time-sections＂ and the certain condition of each time section was defined. In combination with the mechanics analysis,a comprehensive discriminant of the floor water inrush was provided in order to provide the decision to prevent and control the water inrush process with ＂ time section and subzone breaking through＂.
Coal Science and Technology
high pressurized water
deep mining in low group seam
floor water inrush
time sectional and subzone breaking through