【摘要】 以金堆城边坡西南帮为例,通过正交试验法进行反分析,并用强度折减法模拟估算边坡在极限平衡状态下的安全系数。得到的边坡力学参数与理论值相比误差小,可以作为可靠的参数,证实了用FLAC结合正交试验法进行数值模拟的可行性。最后对各个力学参数进行敏感性分析,确定了各参数对安全系数敏感性的顺序依次为黏聚力、内摩擦角、弹性模量、泊松比,为金堆城露天矿边坡稳定性分析和评价,以及为边坡加固提供依据,具有实际工程意义。更多还原

【Abstract】 Jinduicheng southwest slope is taken as an example to estimate the safety factor when the slope is in the limit equilibrium state with back analysis of orthogonal test and strength reduction method of FLAC.The error between back analysis result and theoretical value is small.So the back analysis result is reliable,which confirms the feasibility of orthogonal method combined with numerical simulation using FLAC software.Finally,sensitivity analysis of various mechanical parameters is conducted to determine the sequence of parameters.The sequence is cohesion,internal friction angle,elastic modulus and poisson ratio.The result can provide a basis for the stability analysis and evaluation and the slope reinforcement of Jinduicheng Open Pit,which has practical engineering significance.更多还原