弓长岭露天铁矿北帮边坡的稳定性分析与预测

针对弓长岭露天铁矿北帮边坡出现大范围整体下滑迹象，为避免灾难性事故的发生，利用经典的极限平衡法对现有边坡的稳定性进行分析和预测，研究结果表明：在北帮中西部边坡，受F100断层的影响，剖面1～剖面3最终境界边坡处于不稳定状态或安全储备不足，特别是剖面1和剖面2的不稳定性较大。在剖面4上F100断层与最终境界边坡的距离已超过150 m，边坡已有足够的安全储备。在北帮中东部，受F114断层的影响，剖面5～剖面8最终境界边坡处于不稳定状态或安全储备不足。边坡沿F113断层和F115断层整体发生滑动的可能性不大，但断层在坡面出露处发生局部台阶破坏的可能性较大。

Stability Analysis and Forecast of the North Wall Slope of Gongchangling Open-Pit Mine

There is a sign of a large-scope integral landslide of the north wall slope in Gongchangling Open-Pit Mine.To avoid any disastrous accident, the stability of the current slope was analyzed and forecasted by the classical limit equilibrium method.The results show that, influenced by F100 fault, the final limit slope of Section 1~Section 3 is in instability or has insufficient safety reserve, especially at Section 1 and Section 2.Above Section 4, the distance fromF100 fault to the final limit slope exceeds 150m, indicating a sufficient safety reserve of the slope.In the middle east of the north wall, influenced by F100 fault, the final limit slope of Section 5~Section 8 is in instability or has insufficient safety reserve.There is little possibility for an integral landslide of the slope along F113 and F115 faults, but it is greatly possible that a local bench failure will occur at the fault outcrop on the slope surface.