摘要
某金矿自标高1 385 m以下将由露天开采转为地下开采,拟采用上向进路充填采矿法进行开采,为了避免露天与地下同时开采造成的相互影响,实现矿山生产的平稳过渡,对境界顶柱的合理厚度进行了研究。在相关室内试验的基础上,应用K.B.鲁别涅依特公式、“三带”理论和工程类比法计算出境界顶柱的合理厚度取值范围;采用Flac^(3D)软件对不同境界顶柱厚度进行数值模拟,确定该矿山露天转地下开采境界顶柱的合理厚度。结果表明:矿山原生矿和氧化矿区域进行地下开采时需分别留设20 m和25 m的境界顶柱厚度,此时地下开采对露天边坡的影响最小且采场整体趋于稳定,能满足矿山安全生产的要求。研究结果可为矿山设计提供理论依据。
A gold mine,from below 1385 m elevation,will transition from open-pit to underground mining,intending to use the upward approach and filling mining method.In order to avoid mutual interference caused by simulta-neous open-pit and underground mining and achieve a smooth transition of mine production,it is necessary to study the reasonable thickness of boundary roof pillars.Based on relevant laboratory experiments,the reasonable range of boundary roof pillar thickness was calculated using the K.B.Lu Peinie equation,three-zone theory,and engineering analogy method.Flac^(3D) software was used to numerically simulate different thicknesses of boundary roof pillars to determine the reasonable thickness for the transition from open-pit to underground mining in the mine.The results show that when underground mining is conducted in primary ore and oxide ore areas,boundary roof pillars of 20 m and 25 m respectively need to be reserved,at which point the impact of underground mining on open-pit slopes is minimized and the overall mining area tends to be stable,meeting the requirements for safe mine production.The research results can provide a theoretical basis for mine design.
作者
梁源贵
周宗红
侯廷凯
黄耀春
Liang Yuangui;Zhou Zonghong;Hou Tingkai;Huang Yaochun(Heqing Beiya Mining Co.,Ltd.;Faculty of Land Resources Engineering,Kunming University of Science and Technology;Yunnan Geological and Mineral Construction Engineering Co.,Ltd.)
出处
《黄金》
CAS
2024年第5期19-24,共6页
Gold
基金
国家自然科学基金项目(52264019)。
关键词
露天转地下
开采境界
顶柱
数值模拟
Flac~(3D)软件
顶柱厚度
transition from open-pit to underground
mining boundary
roof pillars
numerical simulation
Flac 3D software
roof pillar thickness
