顺达露天矿陡倾节理边坡稳定性评价  

Stability Evaluation on Steep Joint Slope of Shunda Open-pit Mine

作　　者：张锦旺[1] 白亚光[1] 李佳[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院

出　　处：《现代矿业》2013年第6期42-44,68,共4页Modern Mining

摘　　要：顺达露天矿南帮为一陡倾节理岩体边坡,存在安全隐患。运用优势指标法,确定优势滑面,并计算边坡的稳定性系数。运用不稳定概率分析法,对稳定安全系数进行了可靠度评价;运用单一变量方法,对煤和砂岩的内摩擦角与黏聚力进行了敏感性分析。结果表明,该设计边坡整体稳定,但是低于设计安全系数,整体稳定概率为73%(Fs≤1.1);砂岩内摩擦角对边坡稳定性影响较大,建议实际工程中应注意截排水措施,防止雨水下渗引起岩土体抗剪强度的降低。In the south of Shunda open-pit mine, there is a steep joint rock slope, which has poten- tial safety hazard. Used preferred index method to determine advantage slip surface, the stability factor of slope was calculated. Reliability evaluation was done on stability and safety factor using instability proba- bility analysis method. On the other hand, sensitivity analysis was done on internal friction angle and co- hesion of coal and sandstone by using single variable method. The result indicates that the overall stability of the design slope was fine, but lower than the designed safety factor, the overall stability probability was 73% （Fs ≤ 1.1 ）. Internal friction angle of sandstone has greater impact on stability of slope. It suggests that interception and drainage measures should be noted during the project to prevent reduction of shear strength of the rock and soil caused by rainwater infiltration.

关 键 词：露天矿 边坡 优势指标法 稳定性评价 

分 类 号：TD804[矿业工程—矿山开采]