2047 3.2.5. Maximum Effective Reach from Mobile Substation • Condition: The electrical distance between switch house and shovel must remain within acceptable voltage drop and trailing cable length limits. • Planning Impact: Defines shovel operating zones and relocation frequency. 3.2.6. Maximum Capacity per Mobile Substation • Condition: Transformer MVA rating and protection system limits shall not be exceeded. • Planning Impact: Limits the number of simultaneous shovels supplied by a single node. 3.2.7. Interaction with Haulage Routes • Condition: Electrical infrastructure must minimize crossings with primary haul roads used by hightonnage trucks. • Planning Impact: May require electrical deviations or access redesign. Figure 3 illustrates some of these key technical constraints mentioned. Figure 3 – Technical constraints for the integration of electrical infrastructure into mine design. 3.3 Development of the Integrated Planning Approach Based on the baseline diagnostic and the identification of technical constraints, an integrated framework between mine planning and electrical infrastructure was established, considering power supply as a design variable within the planning process. Constraints related to maximum catenary spacing, blasting impact radii, minimum platform widths, and operating voltage levels (13.8 kV and 7.2 kV) were incorporated as conditioning criteria in the evaluation of alternatives. 200m 200m Planned pole locations 13.8 Kv Phase A Bench35 Phase B Bench44 Blast impact radius 2 SE 34.5 Kv. Planned line 13.8 Kv 200m 200m 280m Max. Catenary Spam Minimum bench width 12m
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