The project of transition from open-pit to underground mining in Panzihua Iron Mine was taken for study.Based on the analysis of relationship between storage and discharge in the stope,it is predicted that the accumulated water in open pit will be maximally 5 m deep in the event of a 50-year extreme rainfall,which has little influence on the stability of crown pillar.Numerical simulation of seepage in the case of fault occurring at the bottom of pit shows that fault zones are the main leakage channel of crown pillar.Some special anti-seepage measures can be taken to effectively reduce the leakage of crown pillar.
关键词
露天转地下/充填法开采/渗流/护顶矿柱/渗流模拟
Key words
transition from open pit to underground mining/backfilling/seepage/crown pillar/seepage simulation
维普
万方数据