The reduction of stratum for Water-inrush analysis of seam floor

Coal mining is restricted by various mine geological disaster, and the largest mine safety issues are the water-inrush accidents. The precondition of Coal mine safety and production is ensuring the safety of coal floor. Usually coal floor is composed by different rock, it cannot be directly applied for mechanics model to analyze and calculate. In this article different formation stratum are reduced to a single fold. Then use the mechanical model of the board to Analysis the floor. We can get the coal seam mining damage caused by the soleplate disturbance in different working face width. Figure out the destruction of each layer in the real strata of cases. We make use of the software of FLAC^3D to analysis the floor in the condition of 3d seepage. Thus the result will play a guiding role in the coal mine safety production.