2048 This approach enabled the alignment of pole locations, mobile substations, and electrical corridors with pit geometry, mining sequence, and operational accessibility for electric rope shovels. Rather than treating the electrical network as a reactive system, design principles were defined to minimize relocations, reduce exposure to blasting zones, and ensure operational continuity as the pit evolved. Although the electrical infrastructure planning was developed across a five‑year horizon, the most representative changes occur in the early years of the sequence. Accordingly, Figure 4 presents the comparison between the current configuration (Year 0) and the optimized layout projected for Year 2, illustrating the initial phase of substation relocation toward active mining areas. As part of this optimization, two benches required widening in order to safely accommodate the new substation positions. These design adjustments were reviewed and approved by the Geotechnical and Long‑Term Planning teams and enabled the substations to be relocated within the defined technical constraints, reducing trailing cable length, mitigating voltage drop risks, and improving power supply continuity as mining advanced. Period: Q1 - Year 0 Period: Q1 Year 2 Figure 4 – Comparison between the current (Year 0) and optimized (Year 2) mobile substation locations, showing their relocation closer to the active phase. The key elements considered in the integrated planning approach are described in the following subsections: 3.3.1 Data Update and Infrastructure Mapping A detailed update of electrical infrastructure data was conducted as part of the study. This work included the precise identification and spatial positioning of mobile substations and switch houses, along with equipment numbering and reference information. Field scanning activities were carried out to determine the physical dimensions and spatial requirements of substations and switch houses. Power lines were also updated topographically and integrated into the mine map, with a clear distinction made between operational and non‑operational lines. In addition, electrical lines crossing main haul routes used for shovel relocations were surveyed to measure clearance distances from the road surface to the catenary, supporting future shovel movement strategies.
RkJQdWJsaXNoZXIy MTM0Mzk2