THE HYDROGEOLOGICAL CONDITION OF WEISHAN LAKE AND ITS EFFECT ON MINING UNDER WATER

The paper discussed the lake'shydrogeological characteristics and effects on mining according to the structure,coal deposit,and the overburden. The feature of deformation and feature of rockmass above the mined-out area and its effect on mining are also stated here. Using fuzzy method,the authors analyzed the safe of mining under the lake, and pointed out some questions which should be considered necessarily.