土质边坡尾矿坝稳定性直接关系到下游人民生命与财产安全.把不同的添加物添加到尾砂中,对比分析不同添加物条件下尾砂的性质和强度,对研究土质边坡的稳定性具有非常重要的作用.首先,对尾砂进行无任何添加物条件下的三轴剪切试验,获得相关的强度参数;其次,设计水泥和碎石的掺量均为15%,执行同等条件下的抗剪强度试验,与无添加物的试验结果进行对比分析;第三,以碎编织袋为添加物,采用应变控制式三轴仪对尾矿砂进行实验室强度试验,研究不同添加物对尾矿砂强度的影响;最后,在不同添加物条件下采用瑞典圆弧法和简化Bishop法计算了尾矿坝边坡的最小安全系数,从结果得到添加碎编织袋增强土质边坡稳定性具有较好的可行和适用性.该研究结果对提高尾矿坝边坡的稳定性具有重要的工程指导意义和借鉴价值.%The slope stability of soil tailings dam is closely related to lives and property safety of downstream residents. Different additives is added into tailings,so as to conduct comparison and analysis of the properties and strength of tialings un-der the conditions of different additives,which is very important for the stability study of soil slope. Firstly,the triaxial shear test is done under the conditions of without any additives,so as to obtain related strength parameters;secondly,the triaxial shear test under the same conditions of former test,during the test process,the contents of cement and crushed stone are both 15%, the test results and the one of the test with no additives are conducted comparison and analysis;thirdly,taken the broken bags as the additives,test of tailings strength is carried out by adopting three stain controlled triaxial apparatus,so as to study the in-fluence of different additives on tailings strength;finally,the minimum safety coefficient of tailings dam slope under the condi-tions of different additives is calculated by adopting Swedish circle method and simplified Bishop method,the results show that it is feasible to improve soil slope stability by using the broken bag. The above study results in this paper has important engi-neering significance and reference value for improving the stability of tailing dam slope.
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