Study On The Floor Water Invasion Regularity Mining On The Top Of Water-pressured

Mining on the top of water-pressured, the water inrush in Coal floor is a complex nonequilibrium and nonlinear evolution process which is affected by many factors. the mechanism of it is a process that the high water-pressured in the floor water-resisting layer burst into the caving void in the working face in the form of outburst and delaying or sluggish, the water break through the obstruct of the water-resisting layers in the floor along the channels inside the water-resisting layers under the working floor. Theoretically, it is very difficult to exactly describe the basic water inrush process characteristics due to the heterogeneity of rock materials, the complexity of geology and the uncertainty of mining.Combined with the example of the 3629 working face in Zhu zhuang Coal mine, this paper applies the methods of theory analysis, similar material simulation and numerical simulation of Ansys to study the water invasion regularity in the floor mining on the top of water-pressured. This has an important theoretic and realistic significance of achieving the safety production in Coal mine and preventing the water-inrush from the Coal floor.The following work is completed in this paper.â‘ Analyzing the types and affecting factors of the floor water invasion, this paper makes certain of the reason of the water invasion in the floor.â‘¡This paper applies the fracture mechanics theory, the elastic-plasticity theory and the finite element method to resolve the damage depth, the transferring character of the stress and the utmost pressure of water invasion in the floor of the water-resisting layer in the coal seam with the complex effect of the mining pressure and the water pressure in the floor water-resisting layers. In addition, the resolution is put into the extract project of the 3629 working face in Zhu zhuang Coal mine forecasting the water invasion in the floor which plays an important guiding role in mining this working face safely.â‘¢Making use of the similar material model and the large FEM software of ANSYS to simulate the terrane stress distribution regularity and the floor movement damage character in the coal seam, this paper analyses the mechanism and the damage regularity of the floor water invasion in the coal seam.