CAJ | 학술논문

随着露天矿山开采深度的不断增加,地应力成为影响边坡稳定性的重要因素.基于改进的Spencer法,推导并建立了考虑水平地应力作用的边坡三维极限平衡计算公式和程序,以首铁水厂铁矿边坡为例进行了应用分析,并与基于强度折减法的FLAC3D数值分析结果和现场监测结果进行了对比研究.研究表明:无论是边坡三维极限平衡分析还是数值模拟,考虑水平地应力作用得到的安全系数都比不考虑水平地应力作用得到的安全系数小,得出的边坡临界滑体尺寸偏大;数值模拟中,考虑地应力作用时得到的位移与边坡现场监测位移更为接近.因此,在深凹高陡边坡稳定性分析中必须考虑地应力的影响.
수착로천광산개채심도적불단증가,지응력성위영향변파은정성적중요인소.기우개진적Spencer법,추도병건립료고필수평지응력작용적변파삼유겁한평형계산공식화정서,이수철수엄철광변파위례진행료응용분석,병여기우강도절감법적FLAC3D수치분석결과화현장감측결과진행료대비연구.연구표명:무론시변파삼유겁한평형분석환시수치모의,고필수평지응력작용득도적안전계수도비불고필수평지응력작용득도적안전계수소,득출적변파림계활체척촌편대;수치모의중,고필지응력작용시득도적위이여변파현장감측위이경위접근.인차,재심요고두변파은정성분석중필수고필지응력적영향.
With the increase of excavation depth in open-pit mines, in-situ stress becomes an important factor affecting slope stability. Based on improved Spencer method, the formulas and program of three-dimensional LEM under horizontal geo-stress have been established and used in the slope of Shuichang open-pit mine. The numerical simulation results, using FLAC3D based on strength reduction method and the in-situ monitoring data of the slope, have been used to compare with the results of LEM. Studies show that the factors of safety under horizontal geo-stress by LEM and numerical simulation method are smaller than that without geo-stress, but the slip masses are bigger. Displacements under horizontal geo-stress gotten by numerical simulation are closer to the values from field monitoring. Therefore, the impact of geo-stress must be considered for stability analysis on deep-concave slopes.