Law of water seepage in water injection into coal seams and parameter determination

In order to decreasity the dense of coal dust the method of water injection into coal seam was is used which controlled coal dust producing form sourcing ensured safet production and workers' health.This essay analyzes the principles of water injection into coal seam and the effect of permeability factor of water in coal seam,a dynamic mathematical model of a coal seam damped by long hole water infusion was established to solve problems of coal seams with a non-saturated and saturated 2D unstable vadose.The finite-element method was applied to solve the problems.The reliable foundations ware determined for defining the suitable way and right parameter of water injection in-140m the coal seam of Changgouyu Mine.All above have provided a new,method of dust control for Changgouuu Mine to decrease the densitg of coal dust in work face and improve production environment of work face.