| With the increase of the demand for coal resources, the improvement of mining technology and the increase of the intensity of mining, the shallow coal resources in Huainan coal field is decreasing with the day, and the mining area has entered the stage of deep mining.Through the exploration data arrangement and analysis of deep resources in Panxie Mining Area of Huainan, elaborate the deep coal seam occurrence conditions and characteristics of the rock mass, the influence of surrounding rock under deep coal mining effect and the main coal seam roof and floor mechanics experiment results analysis and combination of lithology, rock strength and stability characteristics analysis were expounded. The rock failure characteristics under high stress condition are revealed by using the MTS test machine and the acoustic emission as the research method.To study the difference between stress and damage depth, using FLAC3D numerical simulation method to analyze the deep coal seam(target floor elevation for 1260m) floor mining dynamic effect, and shallow coal seam(the comparing floor elevation for 600m) mining were compared of Panxie Mining deep coal mining engineering geological conditions were preliminary evaluated.Taking the critical rupture pressure and the full stress-strain penetration as the test core, the permeability and stress variation characteristics of rock mass were analyzed by changing the influence factors of the permeability coefficient, tested by drilling core. The rock properties of the study area were analyzed, and the water barrier properties and the deep A group of coal mining water inrush factors were comprehensively evaluated.Through the deep Panxie Mining area containing coal strata of hydrogeology and engineering geology test and analysis research, the late deep coal seam mining of water inrush factors analysis,forecast and prevention of water was provided with necessarily geological, hydrogeological and engineering geological parameter information. |
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