In order to solve water pollution problems in abandoned mines, the mine sealing has been investigated. In particular, it is an important subject to predict the variation of mine water flowing out before and after sealing.
Authors have tried to analyze the behavior of ground water flowing through the rock formation under the mine area, based on the Darcy's flow in the homogeneous medium. The theoretical analysis has been carried out on a model in which the stope exists under the hill-side with a gentle slope and the shape of stoped zone is a horizontal disk, by using the finite element method.
As the result, a method of analysis on the filtration could be developed and the correlation between the recharged water and the behavior of filtration could be made clear. The tendency of variation in the drained water is following:(1) The amount of drained water increases gradually like a saturation curve with increasing the amount of recharged water
(2) If the mine water can be impounded in the stoped zone by sealing water flowingout of the lowest level and it can be made flow out of the upper level, the amount of drained water may decrease about 13-35% on the condition describing in this paper.
(3) The amount of drained water increases gradually like a saturation curve with increasing the volume of stoped zone.
(4) The amount of drained water is proportional to the permeability of the ground.
