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Metal Mine ›› 2015, Vol. 44 ›› Issue (03): 40-43.

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Techniques of Underground Water Leakage Control in Meishan Iron Mine

Wang Wenfeng1,2,Gao Feng2,Xu Zhicheng1   

  1.  1.Mining Branch,Nanjing Meishan Metallurgical Development Co.,Ltd.,Nanjing 210041,China;2.School of Resources and Safety Engineering,Central South University,Changsha 410083,China
  • Online:2015-03-15 Published:2015-07-31

Abstract: Aiming at the risk in the production safety caused by underground leakage water in Meishan Iron Mine,the comprehensive governance technology program of underground water leakage was researched and applied on the basis of hydrogeological condition and mining current situation analysis of Meishan iron mine.According to the field status of underground water leakage,it is indicated that the decreased stability of the part of exposed mine rock after meeting water is mainly caused by geological structure,mineral composition,and artificial activities.Based on surface subsidence caused by the caving mining,the characteristics of rainstorm infiltration are analyzed.Water balance method is adopted to forecast water inflow,obtaining that daily rainstorm infiltration rate is 8%.Underground water leakage was divided into mining area leakage and shaft leakage.By comprehensive comparison,curtain grouting is applied to auxiliary shaft,southwest shaft,and north shaft.Local grouting program is used in 1# shaft.Tunnel leakage phenomena were subdivided in 5 types,including roof watering,bottom and corner seepage,tunnel wall holes seepage,large area tunnel watering,leakage and the water pocket in surrounding,and relevant measures for each type were proposed.Significant effect for underground leakage water control in Meishan iron mine was achieved by adopting the programs above.

Key words: Leakage, Infiltration rate, Curtain grouting, Sprayed concrete, Control