This study examines the effects of slope geometry and Geo-mechanical parameters of tailing dumps at Enyigba mine, Nigeria. Fifty-two slopes were studied, with seven sampled for laboratory analysis. Correlation matrix and principal component analysis were employed in the data interpretations. The mechanical properties of the slope materials were investigated using geotechnical tests such as sieve analysis, Atterberg limits, compaction and undrained triaxial tests. Shear strength parameters generated from the triaxial tests were utilized in slope stability analysis executed with the Slope/W Geostudio software. Both statistical and slope stability methods suggested a combination of height and width (dimensions) has more significance on the stability of the dump slopes at Enyigba mine than slope angles (inclination). Height and width constituted 83.61% of the total variance data and represented 16.39%. Particle size distribution of the slope materials showed high percentage of fines. The computed factor of safety of the slopes ranged from 1.00 to 1.30, implying critical stability which indicates liability of the slopes to failure when predisposed to landslide triggering agents. Therefore, slope dimension optimization and stabilization are required on the tailing dumps at Enyigba to prevent severe landslide occurrence.

中文翻译：

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尼日利亚东南部恩尼格巴矿山尾矿的力学性能和临界坡度参数评估

这项研究研究了尼日利亚Enyigba矿的尾矿堆的坡度几何形状和地球力学参数的影响。研究了52个斜坡，其中7个取样用于实验室分析。相关矩阵和主成分分析用于数据解释。斜坡材料的机械性能是通过岩土工程测试（例如筛分分析，Atterberg极限，压实和不排水三轴测试）进行研究的。由三轴测试产生的抗剪强度参数用于通过Slope / W Geostudio软件执行的边坡稳定性分析中。统计和边坡稳定性方法都表明，高度和宽度（尺寸）的组合对Enyigba矿倾倒坡的稳定性比边坡角（倾斜度）更重要。高度和宽度构成83。总方差数据的61％，占16.39％。斜坡材料的粒度分布显示出高百分比的细粉。斜坡的计算安全系数在1.00至1.30的范围内，这意味着临界稳定性，这表明斜坡易受滑坡触发剂的影响而对破坏负责。因此，需要对Enyigba的尾矿堆进行边坡尺寸优化和稳定，以防止发生严重的滑坡。