论文部分内容阅读
降雨强度、初始饱和度、压实系数和张裂缝位置皆为尾粉砂干堆尾矿坝安全性的主要影响因素,其影响主要体现在安全系数、浸润线高度和某断面上潜在滑动面深度。为了探究各影响因素对尾矿坝安全性的敏感性,以某尾粉砂干堆尾矿坝为例,采用正交试验设计和数值模拟相结合的方法及熵权决策法,对4个主要影响因素进行敏感性分析。结果表明:尾粉砂干堆体在降雨条件下只产生表面滑动,不会发生整体性滑坡;不同指标下的最优最劣组合方案不完全相同,但经过熵权决策法综合分析,发现初始饱和度(S)的影响程度最大,且安全系数指标是最佳评价指标;在评价尾粉砂干堆体安全性时,采用3个指标进行多角度综合分析,可得到更精确的结果。
Rainfall intensity, initial saturation, compaction coefficient and location of cracks are all the main factors that influence the safety of Tailing Dam of tailing silt dry-dry. The main factors are the safety factor, the height of wetting line and the depth of potential sliding surface on a section . In order to explore the sensitivity of various influencing factors to tailings dam safety, taking a tailing silt dry-tailing dam as an example, orthogonal test design and numerical simulation method and entropy decision method Influencing factors for sensitivity analysis. The results show that only the surface slips and no landslides occur in dry silt body of tail silt under rainfall conditions. The optimal and worst combination schemes under different indexes are not exactly the same, but after the comprehensive analysis of the entropy decision method, The degree of saturation (S) is the greatest, and the index of safety factor is the best evaluation index. When evaluating the safety of tailings dry piles, multi-angle comprehensive analysis using 3 indexes can get more accurate results.