Research Article

Mechanical Characteristics of Tailings in Different Depositional Zones: A Case Study of Caijiagou Tailings Pond in Shaanxi, China

Table 2

Comprehensive experimental plan for tailings characterization.

Type of testEquipmentSample sizeConditionsPurpose

Compression testsSingle lever soil consolidation instrument (Figure 3(a))Cylindrical, base area 50 cm2, height 2 cmDouble-sided drainage, vertical pressures of 12.5, 25, 50, 100, 200, 400, 800, and 1,600 kPaInvestigate the compression deformation patterns of tailings and understand the impact of composition and gradation on the compression behavior of tailings

Triaxial shear testsStrain-controlled direct shear instrument (Figure 3(b))Cylindrical, base area 30 cm2, height 2 cmTwo drainage methods, consolidated drained (CD) and undrained (CU), effective confining pressures of 50, 100, 200, and 300 kPaExplore the shear strength of tailings, considering particle size, gradation, and drainage conditions, and the behavior of tailings under different vertical pressures

Dynamic testsDynamic tests (Figure 3(c)).Cylindrical, base area 12 cm2, height 80 mmConsolidated-undrained cyclic triaxial tests, Kc set to 1.0 and 2.0, effective confining pressures set at 200, 400, and 600 kPaStudy the dynamic response of tailings under cyclic loading, including dynamic elastic modulus and damping ratio, and the dynamic shear stress value under a certain number of vibration cycles