For estimating the amount of infiltrated water during heavy rainfall after transition from open-pit mining to underground block caving,the Beiyi mining area of Shilu Iron Mine in Hainan Province after transition from open-pit to underground mining was taken for study.The characteristics of"three zones"formed due to overburden subsidence during the block caving of Beiyi mining area were analyzed based on the field investigation and numerical simulation of land subsidence area.The influence of different overburden on the infiltration coefficient of rainfall was also analyzed with a numerical calculation model for unsaturated overburden.Then,based on the practical measurement of rainfall and drainage,statistical analysis and inverse analysis were conducted for the infiltration coefficient of the caving zone and the surface runoff coefficient.The infiltrated water due to heavy rainfall in Beiyi mining area after transition from open pit from underground mining is calculated to be 225386 m3,which can provide a reference for the design of infiltration and drainage system for the mine after transition from open-pit to underground mining.
关键词
露天转地下/降雨入渗/崩落法/渗入系数/渗透系数/入渗量预测/涌水量/裂隙带/冒落带/覆盖层
Key words
transition from open-pit to underground mining/rainfall infiltration/block caving/infiltration coefficient/percolation coefficient/prediction of infiltration/amount of infiltrated water/fracture zone/caving zone/overburden
维普
万方数据