Aya Gold & Silver Inc.
For the period ended Oct 20, 2026. Filed Oct 21, 2026.
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Oct 20, 2026 · Filed Oct 21, 2026
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EX-99.1 · Table 16-6 Open Pit Design Parameters
Table 16-6 Open Pit Design Parameters
| Parameter | Value |
|---|---|
| Layback in overburden | 2H:1V |
| Bench height in overburden | 10 m |
| Bench width between the overburden and rock | Equal to overburden width |
| Bench in rock | Double 10 m (20 m) |
| Face angle | 70° – 80° |
| Minimum catchment width | 0.2 x Bench height + 4.5m |
| Inter-ramp slope angle | < 48° for east dipping slopes |
| Slope break | Every 100 m |
| Slope break catchment width | Double width of a standard catchment |
| Pre-split blasting | None |
| Ramp gradient | 10% |
| Turning radius | 20 m |
| Ramp width double lane (90 t size trucks) | 20 m |
| Ramp width single lane | 12 m |
| Minimum operational bench width | 30 m |
The mine design process is iterative and aims to transform the optimal pit shells into an operational open pit project. Once completed, the total tonnage of the designed pit should not differ significantly from that of the optimized pit shells. The detailed pit designs were carried out using Deswik mining software. It includes haulage ramps providing access to all benches, except for the final benches which will be excavated via temporary ramps.
16.5.4 Haul Road Design
The haulage ramps are sized to accommodate the largest haulage truck (xx t capacity) and are designed for two-way traffic, except for the final levels of each phase, which are designed for one-way traffic. For the two-way traffic, the design considers a buffer space equivalent to half the width of the largest truck width (CAT 785). Safety berms are designed at half the diameter of the haul truck tires. Figure 16-9 (a) and (b) show a schematic of the haul ways for double and single lane.
(a) (b)
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