Abstract: It taking under-group coal seams mining of Huaibei mine area as example，collapse column water inrush principle that induced by mining in deep was studied，collapse column water inrush model was built.Secondary development was made for FLAC^3D based on FISH，and then the broken characters of collapse column under different advanced distance with fluid-solid coupling effect were studied.The results showed that under coupling effect of high ground pressure in deep and high confined water，with working face cutting，lateral plastic deformation appeared in collapse column.Plastic broken scope developed to outward under minging influence，an intact strata width between fracture zone before working face and collapse column plastic broken zone，when working face advance distance was about 50m，two sites were connected thorough at the site to collapse column was about 30m，then water inrush channel formed，and would inducing collapse column water inrush，the results showed that collapse column water inrush process and principle under fluid and solid coupling effects of coal seam mining in deep.