中文摘要：

露天转地下矿山边坡稳定性是一个当前广泛存在的问题,合理评估边坡失稳滑移对边坡底部围岩的影响及破坏效应对地下开采有重要的工程意义.以大冶铁矿露天开挖形成的边坡为工程背景,运用二维数值模拟软件UDEC,对滑体的滑移过程进行了数值模拟分析,从应力场、位移场入手,研究了边坡滑体失稳后其冲击力作用下边坡底部围岩应力应变规律.模拟结果表明：用离散元软件可有效模拟滑体失稳过程,滑体失稳后,其冲击作用影响范围主要集中在北帮边坡坡脚,而对采矿区和南帮边坡影响不大,采矿区和南帮边坡主要受滑体失稳后形成的堆积体的重力作用影响;竖直方向上,围岩受冲击影响程度随深度的增加而减弱;水平方向上,南帮边坡受滑体影响程度远小于采矿区和北帮边坡坡脚.

英文摘要：

The slope stability in the mine transferred from open pit to underground mining is a widely existing problem and the rational evaluation of the slope slip effect on surrounding rock at the bottom of the slope has important engineering significance for underground mining.Taking slopes formed in the process of excavation in Daye Iron Mine as project background,the sliding process of slide mass is numerically simulated with UDEC software,and the stress-strain laws of surrounding rock under the impact of sliding slope on the bottom after the slopes became unstable were studied from perspective of the stress field and displacement field.The results showed that the DEM software can effectively simulate the un-stability of sliding mass.After the un-stability occurs,the impact action mainly focuses on the foot of the northern slope and has a less impact on the mining area and the southern slope.The self-weight of sliding mass on mining area and hanging wall is obvious.On the vertical direction,the impact on surrounding rocks is weakened with the mining depth increasing.On the horizontal direction,the impact of sliding mass on the southern slopes is much lower than that on the mining area and the northem slopes.