Analysis on gushing water in complex karst mining area— A case in ferromanganese mine Ⅱ in Daoxian, Hunan Province

Water gushing of mine is the most important issue in mining, and reasonable predicting method for gushing water is a hot and difficult problem in research circle at present. Ferromanganese mine Ⅱ in Daoxian, Hunan is taken as the example. The water gushing of mine is simulated by means of finite-difference methods. The simulation results shows that the gushing water mainly comes from the Chezijiang river but the water come from rainfall, the east, south and north boundary increase, which proving the gushing water is recharged widely. On the other hand, the lithology and geological structure as well as groundwater characteristics are investigated, the boundary conditions are determined, and the finite difference numerical methods are used to simulate the groundwater. The results show that, the numerical simulation can be used to forecast water gushing of mine in different conditions and different mining level as well as complex hydrogeologic conditions. In one word, the simulation results can be used as the basis for the design of mining.