摘要
露天转地下开采过程中以露天采坑作为尾矿库使用,最主要的技术问题是保证边坡的长期稳定。针对紫木凼金矿露天转地下房柱采矿法开采特点和难点,采用FLAC-3D分析软件,对不同回采顺序对边坡稳定性的影响进行三维数值模拟分析,研究采场顶底板和坡面围岩的变形、塑性区和应力分布特征及规律。该研究不仅揭示了露天转地下开采过程中边坡复杂应力场变化规律,弥补了现场实测中存在的不足,而且对采场地压控制也具有一定的指导意义。
The long-term stability of slope is the most difficult technical problem when the ppen pit was used as railings pool in transferring open-pit mining to underground mining. Considering the difficulties and characteristics of pillar-and-room method in transferring open-pit mining to underground mining of Zimudang gold mine, FLAC -3D was applied to simulate and analyze the influences of diverse extraction sequence on the slope stability. Besides, the deformation of the stope back and slope surrounding rock, and the distribution characteristics of plastic zone and stress were researched. The result discovered the variation characteristics of the complicated stress field in transferring open- pit mining to underground mining, and offset the shortcomings in field measurement. Further more, the result is of great value to guide the practical control of the stone stress.
出处
《黄金》
CAS
北大核心
2008年第11期20-24,共5页
Gold
基金
国家"十一五"科技支撑计划资助项目(2006BAB02A02)
关键词
露天转地下开采
边坡
稳定性
FLAC-3D
transferring open-pit mining to underground mining
slope
stability
FLAC - 3D
