露天转地下开采强降雨入渗特征分析及降雨入渗量预测  

Characteristics Analysis and Prediction of Heavy Rainfall Infiltration After Transition from Open-Pit to Underground Mining

作　　者：张艺山 何祥 张妨 王少泉 东龙宾 兰舟[1] ZHANG Yishan;HE Xiang;ZHANG Fang;WANG Shaoquan;DONG Longbin;LAN Zhou(Hainan Mining Co.,Ltd.,Changjiang 572799,Hainan,China;Northern Engineering&Technology Corporation,MCC,Dalian 116600,Liaoning,China)

机构地区：[1]海南矿业股份有限公司,海南昌江572799 [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6期23-27,共5页Mining and Metallurgical Engineering

基　　金：大连市优秀青年科技人才项目(2022RY12)。

摘　　要：针对露天转地下崩落法开采强降雨入渗量估算问题,以海南石碌铁矿北一采区露天转地下工程为例,借助现场调查、塌陷区数值模拟,分析了北一采区崩落法开采过程覆岩沉陷“三带”特征;采用覆盖层非饱和数值计算模型,分析了不同覆盖层形态对降雨渗入系数的影响;结合矿山实测降雨和排水数据,对冒落带渗入系数、地表径流系数等进行了统计和反演分析。计算得到北一采区露天转地下强降雨入渗量为225 386 m^(3),可为露天转地下开采防排水系统设计提供依据。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 225 386 m~3,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 

分 类 号：TD85[矿业工程—金属矿开采]