Mine Drainage Prediction Of Jiangliyuan Iron, Jiangsu Province

Whether mine drainage prediction is close to reality, not only bring security and efficiency of mining, but also provide a scientific basis for mine water in accordance with the design of economic rationality.However, whether the accuracy of mine drainage prediction, mine water filling depends not only on the correct analysis of hydrogeological conditions and rationality selection of calculation parameter,but also on forecasting methods and selection of mining programs, the most of current predictions results which is not very close to the actual mining, resulting in great difference between prediction and actual results, are based on basic conditions of prospecting stage. Take Jiang Liyuan Iron Mine as an example, Quantities of mine drainage are used to study based on the mining program.Jiangliyuan iron, Pei County Jiangsu province is a contact metasomatic iron opera-hydrothermal iron deposits, the type of ore bodies buried, and the overlying quaternary has the characteristics of thickness and widespread distribution.Ore bodies occur in Ordovician crystallization Xiao County Group limestone,marble,dolomitic limestone and diorite porphyry contact zone of an orebody, and hydrogeological conditions are complicated. In the research, hydrogeological work based on the results of geological survey were hydrogeological exploration to mining design,construction,pumping tests and so on;Based on the analysis and organizasion of the perambulate materal,including sifted materald,a geneal summary about the mine regional, geology and hydrogeological conditions as well as Water Filling conditions were maded.After which a hydrogeological conceptual model were proposed;Hydrological simulation method, analytical steady flow method and numerical method,were used to predict the discharge of mine;Combined design of mine tunnel exploitation, numerical method was used to predict mine drainage.The results showed that: Besides the apparent difference in the result data,the properties of the result are not all the same;analytic method and simulation method for the predicted value is constant,the prediction obtained by numerical method gradually decay.Combined with mine drainage during the mining,water yield of mine based on the predicted results on a comprehensive analysis and evaluation was put forward.During the exploitation of Jiang Liyuan iron,the discharge gradually decay over time;in the-230mlevel mining,the largest water yield is the 7256.4m3/d.The prediction results not only provide technical basis for Jiangliyuan iron mining design, but also provide some reference for mine study which have similar hydrogeological conditions.