Underground Ramp Geometry CAD Template (DWG)

Underground ramp design is a critical element of mine access infrastructure that directly impacts production rates, equipment selection, and operating costs. This CAD template library provides parametric drawing blocks for the three primary ramp configurations: spiral (continuous turn at constant or variable radius), switchback (alternating straight segments with reversal curves), and straight decline (single gradient with optional intermediate benches). Each template incorporates design criteria for the intended vehicle fleet—typically ranging from 20-ton articulated dump trucks to 60-ton rigid frame haulers—including minimum curve radius (typically 3-5x vehicle wheelbase), maximum gradient (typically 12-15% for loaded haulage), road width (vehicle width + 2× clearance), and vertical clearance (vehicle height + 0.5m). The template includes detail drawings for drainage provisions (crossfall, center crown, side ditches), ventilation clearance envelopes, and refuge station spacing. Design automation features include dynamic blocks that auto-adjust geometry when input parameters change, reducing design time for new ramp sections. The DWG format ensures compatibility with standard mine planning software suites (Deswik, Vulcan, Datamine) for integration into comprehensive mine plans.