Prediction Of Water Inflow In Complex Karst Water-filled Deposits In Guizhou

The hydrogeology of the deposit is the study of groundwater as an object of need for prevention and removal.Therefore,to strengthen the mineral hydrogeological work,not only to ensure the safety of energy and mineral development,but also a relatively increase in China's energy and mineral resources reserves.This paper takes Qinglong Coal Mine as the research object,through the methods for forecasting water inflow of learning and understanding,on the basis of the information collected,analyzed the geological conditions and hydrogeological conditions,including geological structure and hydrogeological characteristics.On the basis of numerical method,well method and hydrogeological analogy method as the prediction method of water inflow,get some results:1)Based on the analysis of regional and geological conditions,hydrogeological conditions,a preliminary analysis of the development rules of structure in the area,to determine the effect of structure on the hydrogeological and engineering geological conditions of coal seam roof and floor.2)According to the present mining situation of the mine,it is determined that the main coal seam has 16,17 and 18 coal seams.At present,the 16 coal seam of the upper Permian formation of Permian is the main coal seam.3)On the basis of hydrogeological analysis,the lithology and hydrogeological characteristics of the main aquifers and aquicludes are analyzed,and the relation between the aquifer and the water filling of the deposit is determined.And the filling water source and the water filling channel of the mine.4)Based on the geological conditions and hydrogeological conditions,the southeast boundary of the mining area is divided into the water separation boundary.The northwest boundary is the water separation boundary.The northwest boundary is the variable water head boundary,and the Northeast boundary is the drainage boundary.5)Based on the aquifer structure analysis,the maocaopu Quaternary formation and upper generalized as the first layer of phreatic aquifer,Yelang group are generalized into second confined aquifer;Changxin karst fissure aquifer and Longtan karst fractured into third aquifers bearing limestone aquifer.A threedimensional groundwater flow model is established by using Visual Modflow software.6)The model is used to predict the water inflow of mines,and the results are compared with those calculated by the analytical method.The prediction results can provide a reliable basis for drainage design of mining area.