• Design the tailings receiving hopper and the longitudinal tailings stacker to avoid the “rat hole” phenomenon. Figure 7 – Storage Test Additionally, the following activities are being carried out due to the complexity of the project and its interaction with Mine and Concentrator Operations areas: • Truck traffic simulations • Project reliability, availability, and maintainability simulations. The main findings were: • Maximum dewatering tailings moisture for avoiding “rat hole” (bin) or “slip – back” (tailings conveyor) phenomenon should be 15%. • It was determined the chutes geometry to avoid premature wear during operations • As soon the mixture homogeneity is obtained, it is not lost due to idler conveyor vibrations. 3.2.5 Large Scale Triaxial Testing - Phase 1 (IDIEM - Chile) Large scale triaxial tests10 were carried out, thereby inferring the behavior of the mixtures when deposited in the dumps, with the aim of evaluating the geotechnical stability and compressive strength of the mixtures, which will be deposited in the dumps. It was used intrusive (waste rock) and M4 (tailings) material at different mixed ratios 3.5: 1, 4.5: 1, and 5.5: 1. Monotonic and Loading & Unloading testing were performed, whose results are shown below: 10 Diameter of 0.6 m and 1.2 m of height
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