高陡边坡滑坡的潜在影响因素分析及安全评价

针对厂坝露天矿高陡边坡滑坡的可能性和影响因素的不确定性,根据现场调查资料及监测数据,首先分析了影响边坡滑坡的五个潜在影响因素,并通过正交实验找出了关键影响因素,分析了影响滑坡的关键作用路径;然后进行回归分析,获得了影响因素与位移矢量间的拟合函数,并在极限状态下数值计算得出一系列岩体强度参数及其对应的位移和安全系数.最终获得了岩体参数和位移矢量之间以及安全系数和位移矢量之间的拟合函数.研究表明,该边坡安全系数在1左右,处于较不稳定状态,应加强监测.

Potential influencing factors analysis and safety evaluation on the landslide of high and steep slope

Aimed at the landslide possibility and influencing factors' uncertainty of high and steep slope in Changba Opencast Mine of China, five potential influencing factors of slope landslide were firstly investigated based on field investigation and monitoring data. The key factors were analyzed by means of orthogonal experiment and the key mechanism paths acting on the slope were discussed. Then the fitting function between the influencing factors and displacement was obtained by regress method. A series of rock strength parameters, their corresponding displacements and safety coefficients were computed out in limit state. In the end, the fitting functions between rock strength parameters and displacement and between safety coefficients and displacement were presented. The results show that the safety coefficients approach 1, which indicates that the slope is in unstable state and the monitoring should be enhanced.