露天转地下充填法开采护顶矿柱防渗性研究  

Anti-seepage Measures for Crown Pillar Extraction in Transition from Open-Pit to Underground Mining by Backfilling Method

作　　者：张良兵 冷建勇 张妨 何祥 王少泉 ZHANG Liangbin;LENG Jianyong;ZHANG Fang;HE Xiang;WANG Shaoquan(Design and Research Institute of Panzhihua Group Mining Co Ltd,Panzhihua 617000,Sichuan,China;Northern(Dalian)Engineering&Technology Corporation Ltd,MCC,Dalian 116600,Liaoning,China)

机构地区：[1]攀钢集团矿业有限公司设计研究院,四川攀枝花617000 [2]中冶北方(大连)工程技术有限公司,辽宁大连116600

出　　处：《矿冶工程》2024年第1期35-38,共4页Mining and Metallurgical Engineering

基　　金：大连市优秀青年科技人才项目(2022RY12)。

摘　　要：以攀枝花铁矿露天转地下开采工程为背景,通过采场贮排平衡分析,预测50年一遇暴雨时露天采坑积水最大深度为5 m,采坑积水对护顶矿柱稳定性影响较小。对坑底存在断层条件下积水渗流进行了数值模拟,结果表明,断层破碎带是护顶矿柱的主要导水通道。采取针对性封堵措施可显著减小护顶矿柱的渗漏量。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 

分 类 号：TD85[矿业工程—金属矿开采]