尾矿高坝的边坡稳定性研究

尾矿坝的安全运行是保证矿山生产正常运行的必要条件。针对江西某尾矿高坝,在现场调查的基础上,进行了现场勘察和取样工作,分析了尾矿沉积规律和坝体组成结构,开展了不同工况下的坝体稳定性研究,并探讨了坝体灾害的防治措施。研究结果表明,从坝区至库内,尾矿由粗变细的趋势非常明显;由上到下,由于采用中线法堆积,尾矿由粗变细的趋势不大明显;尾矿坝的沉积滩形态舒缓,其坡度较为平坦,且未见尾矿泥;尾矿坝处于正常运行工况和洪水运行工况时,计算的安全系数能满足规范要求,尾矿坝基本处于稳定状态;在尾矿坝处于全饱和工况和地震工况时,计算出的安全系数远低于规范规定的要求,坝体的稳定性也明显降低,使得坝体处于极不稳定状态。

Study on the slope stability with the tailings dam

The safety operation of tailings dam is the necessary conditions to ensure that the tailings dam is steady. In view of Jiangxi a tailings dam, the thesis achieved the work of field investigation and sampling, and analyzed the dam composite and tailings deposition law. the study of dam stability was carried out in the different working conditions and the disaster prevention measures was discussed. The research results indicated that: from dam to inside in the tailings dam, it was very obvious that the change trend was from coarse to fine with the tailings. However, the change trend of tailings from coarse to fine was not obvious from top to down in the tailings dam. The change was slow in the deposited beach, the slope is relatively flat, and it had not tailings mud in the tailings dam. When the tailings dam run in normal operation condition and flood operation condition, the calculated safety factor could meet the standard requirements and the dam was in a stable state. However, the safety factor is far lower than the standard requirements in full saturation condition and seismic condition. The stability of dam is reduced significantly, which led to the tailings dam in a unstable state.