露天转地下崩落法开采对高陡边坡影响的数值模拟  

Numerical Simulation of the Influence of Caving Mining on High and Steep Rock-slope in the Transition from Open-pit Mining to Underground Mining

作　　者：李扬[1] 梅林芳[2] 周传波[1] 

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074 [2]武钢矿业有限责任公司大冶铁矿,湖北黄石435006

出　　处：《矿冶工程》2008年第3期14-18,21,共6页Mining and Metallurgical Engineering

摘　　要：针对大冶铁矿采用无底柱分段崩落法形成的塌陷区问题,采用ANSYS和FLAC3D联合建立了三维模型,研究了塌陷区回填和不回填两种情况对露天转地下开采形成的高陡边坡的影响。通过对位移场、塑性区和应力场的计算结果分析,得出了影响规律。并设立位移监测点,分析高陡边坡的变形规律,将计算结果与实测结果进行了对比。结果表明,数值模拟分析结果与实际情况比较吻合,对塌陷区的回填限制了高陡边坡岩体的位移,改善了边坡岩体的应力状态,使边坡更加趋于稳定。In view of subsidence developed while adopting sublevel caving method without sill pillar in Daye Iron Mine, a three-dimensional numerical model is constructed by ANSYS and FLAC3D to study the influence of the subsidence with and without backfilling on high-steep open-pit slope. After analyzing the calculation results of displacement field, plasticity zone and stress field, the rules of influence was revealed. And some displacement monitoring points were established to analyze the transformative regulation of high-steep open-pit slope. Comparing the calculation results with actual monitoring results, it is found that the analysis results by numerical simulation are in agreement with the actual situation. Backfilling of subsidence limits the displacement of rock of high-steep open-pit slope, and has improved the stress situation of slop rock, resulting in slope more stable.

关 键 词：无底柱崩落法 塌陷区 数值模拟 高陡露天边坡 

分 类 号：TD853[矿业工程—金属矿开采]