铜业工程Issue(2)：85-94,10.DOI:10.3969/j.issn.1009-3842.2025.02.011
永平铜矿露天转地下开采过程地压分布特征研究
Distribution Characteristics of Ground Pressure during Open-Pit to Under-ground Mining in Yongping Copper Mine
摘要
Abstract
After Yongping Copper Mine is transformed from open pit to underground mining,underground mining will affect the stabili-ty of the western open pit slope,the southern dump,the isolation pillar between open pit and underground mining of the northern part of orebody Ⅱ,and the underground stope near the fault.In this paper,a 3D numerical simulation model of underground mining process of Yongping Copper mine is established by using FLAC3D software based on the data of mine engineering geological conditions and mining design planning.The distribution characteristics of ground pressure and the influence of underground mining on these areas described above.The research shows that:In the mining process of the northern part of orebody Ⅱ,it may cause misalignment of the hanging wall surrounding rock and isolated pillar.In the mining process of the southern part of orebody Ⅱ,the potential failure area is concentrated around the stope.In the mining process of the upper part of orebody Ⅳ,the stress change at the foot of open slope is obvious.In the mining process of the lower part of orebody Ⅳ,which is controlled by F2 fault,and the end of stope is prone to stress concentration.The displacement of surrounding rock caused by pillar mining in the second step accounts for 60%～80%of the total displacement.In general,potential ground pressure risks such as stress concentration and deformation have appeared in the above areas in the mining process.Monitoring of ground pressure risk areas should be strengthened in the subsequent mining process.The research result also provides technical support for the design of ground pressure monitoring plan.关键词
露天转地下/地压分布特征/FLAC3D/数值模拟Key words
open pit to underground/distribution characteristics of ground pressure/FLAC3D/numerical simulation分类
矿业与冶金引用本文复制引用
胡天寿,涂帆,姜明媚,王旭刚,蔡永顺..永平铜矿露天转地下开采过程地压分布特征研究[J].铜业工程,2025,(2):85-94,10.基金项目
国家重点研发计划项目(2022YFC2904102)资助 （2022YFC2904102）
