独木陇尾矿坝抗滑稳定的可靠度分析

在独木垅尾矿坝抗滑稳定分析和评价中引入蒙特卡洛法,考虑粘聚力、内摩擦角、密度等尾矿参数变异性和孔隙水压力不确定性的影响,求出了坝体稳定安全系数与安全系数可靠度指标,2个安全指标均表明坝体已处于临界稳定状态。然后通过随机变量敏感性分析确定了孔隙水压力是影响坝体稳定的最不利因素,从而提出了加强坝体排渗措施的整改建议。研究方法对其他尾矿坝抗滑稳定分析与评价具有借鉴意义。

Reliability Analysis on Anti-sliding Stability for Dumulong Tailing Dam

Monte Carlo method was introduced in anti-sliding stability analysis and assessment for Dumulong tailing dam.Considering the influences of the variability of tailing mineral parameter such as the cohesive force，internal friction angle，bulk specific gravity and uncertainty of pore-water pressure，the stability safety factor and its reliability index of the tailing dam are calculated.Both security indices show that the stability of the dam is in critical condition.Then the pore-water pressure is determined as the most leading factor for affecting the instability of the dam by the sensitivity analysis of these random variables.And then the reinforcement measures on improving drainage facilities in the dam are suggested accordingly.The research method adopted in the paper has a reference for analysis and evaluation of similar tailing dams' stabilities.