The Numerical Simulating Study Of Working Face Water Inrush Theory Under High Confined Water

For a long time, the safe mining of our country's coal resources has been seriously affected by a primary factor which is water inrush from coal seam floor. It is a complicated problem involving several of subjects such as geology, coal mining, rock hydraulics and rock crack mechanics. The influence of confined water become more and more serious with the increase of mining deepness , the paper give summing-up to studying fruit of water inrush from coal seam floor, integrating statistical analysis the result to coal mining working face coal seam floor water inrush which is brought by the high confined water.During the course of numerical simulating mechanics model , primary factors including confined water and geologic structure are analyzed in the paper. The parameter of model combine to actual parameter of colliery , then, utilizing ANSYS research on the several of projects of numerical simulating test on the water inrush from coal seam floor is made in this paper, and judge whether occur water inrush. Study indicating, 1. the stress change of seam floor is much clearer, compare with only think of mining during working face mining , because of the influence of water inrush and cranny.2.the stress change of cranny seam floor is much clear, Which can account for the main factor of seam floor water inrush is from confined water press and cranny.And then, combining actual engineering of 21513 working face in Langzhuang coal mine, numerical simulation on mining process is made and whether water inrush can occur is anticipated,. and combining the result of numerical simulating use routine classical water inrush method to forecast coal seam floor water inrush of LangZhung coal mine 21513 coal mining working face.