某多金属矿露天开采终了边坡结构参数分析及稳定性验算OACSTPCD
Structural Parameter Analysis and Stability Calculation of End-of-pit Slope of a Polymetallic Mine
露天多金属矿山的边坡稳定性是确保矿山安全生产和环境保护的关键问题.采用正交实验设计、极限平衡法和FLAC3D数值模拟等方法,对某露天矿山终了边坡的结构参数进行系统分析,并对其稳定性进行验证.通过正交实验设计,考察了不同坡高、坡角和地质条件下的边坡稳定性参数,并结合简化Bishop法和Morgenstern-Price法计算了安全系数.结果表明,在自然条件下,各坡面的安全系数均大于 1.17,符合规范要求.为了进一步验证边坡的稳定性,采用FLAC3D数值模拟结合强度折减法进行三维稳定性分析.模拟结果表明,在边坡顶部和表面局部区域存在一定风险,但整体安全系数为 1.78,表明边坡处于稳定状态.本研究不仅为露天矿山边坡设计和稳定性评价提供了理论依据和实践指导,也为类似工程项目提供了借鉴,具有提升矿山开采安全性和延长矿山寿命的重要价值.
The slope stability of open-pit polymetallic mines is the key problem to ensure mine safety and environmental protection.In this paper,orthogonal experimental design,limit equilibrium method and FLAC3D numerical simulation are used to systematically analyze the structural parameters of the end slope of an open-pit mine and verify its stability.Through orthogonal experiment design,slope stability parameters under different slope height,slope Angle and geological conditions were investigated,and the safety factor was calculated by using simplified Bishop method and Morgenstern-Price method.The results showed that under natural conditions,the safety coefficient of each slope was greater than 1.17,which was in line with the standard requirements.In order to further verify the stability of the slope,FLAC3D numerical simulation combined with strength reduction method was used for three-dimensional stability analysis.The simulation results showed that there were some risks in the top and local areas of the slope surface,but the overall safety factor was 1.78,indicating that the slope was in a stable state.This study not only provides theoretical basis and practical guidance for slope design and stability evaluation of open-pit mine,but also provides reference for similar engineering projects,which has important value of improving mining safety and prolonging mine life.
刘国寅;孙发院;丁军明;杜德岗;尹修平;张鲲华
昆明坤泽矿业技术有限责任公司,云南 昆明 650051云南亚融矿业科技有限公司,云南 昆明 650033
矿山工程
边坡稳定性Bishop法Morgenstern-price法强度折减理论FLAC3D
slope stabilitybishop methodmorgenstern-price methodstrength reduction theoryFLAC3D
《矿产保护与利用》 2024 (004)
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