露天转地下开采露天边坡稳定性数值模拟分析及研究
Numerical Simulation Analysis and Research on the Stability of Open-Pit Slopes from Open-Pit to Underground Mining
胡建钊1
作者信息
- 1. 金诚信矿山工程设计院有限公司,北京 100070
- 折叠
摘要
某金属矿山原采用露天开采,随着露天开采资源的逐渐枯竭,现转为地下开采,考虑到地下开采对露天边坡的稳定性必然存在一定的影响.设计在露采最终边坡一侧保留 50m宽度的保安矿柱,以保证露天最终边坡的稳定性.采用数值计算与强度折减相结合的方法,选取具有代表性的3 条剖面线,建立边坡计算模型,对边坡原始状态、空场法开采和充填法开采后3 种不同工况下的露天边坡模型进行稳定性计算并确定相应工况下边坡的稳定性.最终得出当采用强度不小于1 MPa充填体进行充填法开采计算时,3 个典型边坡的安全系数均大于 1.15,处于稳定状态.
Abstract
A certain metal mine originally used open-pit mining,but with the gradual depletion of open-pit mining resources,it has now switched to underground mining.Considering that underground mining will inevitably have a certain impact on the stability of open-pit slopes.The design preserves a width of 50 meters on one side of the final open-pit slope to ensure the stability of the final open-pit slope.Using a combination of numerical calculation and strength reduction methods,three representative profile lines were selected to establish a slope calculation mod-el.Stability calculations were conducted on the open-pit slope models under three different working conditions:the original state of the slope,the open-pit mining method,and the filling mining method,and the stability of the slope under corresponding working conditions was determined.Finally,it was found that when using a filling material with a strength not less than 1 MPa for mining calculation,the safety factors of the three typical slopes were all greater than 1.15,indicating a stable state.The research results have certain reference value for the safe and efficient min-ing of tungsten mines and other metal mines from open-pit to underground.
关键词
露天转地下开采/边坡稳定/数值模拟/强度折减法Key words
from open-pit to underground mining/slope stability/numerical simulation/strength reduction method引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据