Table 16.20 - Blasting Pattern Parameters
| BLAST DESIGN |
|---|
| Description | Unit | Mineralized Material | Waste |
|---|
| Drill Pattern |
|---|
| Burden | m | 3.0 | 4.0 |
|---|
| Spacing | m | 5.0 | 6.0 |
|---|
| Material Density | t/m3 | 2.84 | 2.84 |
|---|
| Bench Height | m | 10 | 10 |
|---|
| Volume Blasted per Hole (in situ) | m3/year (in situ) | 150 | 240 |
|---|
| Mass Blasted per Hole | t | 425 | 680 |
|---|
| Hole Inclination | ° | 0 | 0 |
|---|
| Subdrilling | % | 10% | 10% |
|---|
| Total Hole Length | m | 11.00 | 11.00 |
|---|
| Hole Diameter (in) | pol. | 4 | 4 |
|---|
| cm | 10.2 | 10.2 | |
|---|
| Hole Volume | cm3/m hole | 8,107 | 8,107 |
|---|
| Stemming Length | m | 1 | 1 |
|---|
| Explosive Column Length | m | 10.0 | 10.0 |
|---|
| Explosive Density | g/cm3 | 1.10 | 1.10 |
|---|
| Hole Charging Factor | % | 100% | 100% |
|---|
| Explosive Charge per Hole | g | 89,181 | 89,181 |
|---|
| Powder Factor | g/t | 210 | 131 |
|---|
| GoldMining Inc. NI 43-101 Report – São Jorge Project | Page 206 |
|---|
16.13.3** Equipment Selection**
A preliminary selection of the main mining equipment was carried out based on the selected mining method, pit geometry, physical characteristics of the materials to be mined, required production scale, and capital and operating costs, among other factors. The selected equipment is commonly used in similar operations and is widely applied in mining and earthmoving activities.
The equipment selection is conceptual in nature and reflects the level of accuracy appropriate for a PEA study. The mining equipment fleet includes:
| ● | Service truck (fuel and lubrication truck); |
| ● | Crane truck (Hiab/Munck); |
A brief description of the equipment functions is provided below:
| ● | Hydraulic crawler excavator with an operating weight of approximately 69 t, equipped with a 2.3 m³ bucket, used for excavation and loading of mineralized material, both in the pit and at the ROM stockpile; |
| ● | On-road truck with a nominal payload capacity of 25 t, equipped with a 16 m³ dump box, used for hauling both mineralized material and waste; |
| ● | Crawler dozer with approximately 250 HP engine power, used for waste spreading at the waste dumps and for auxiliary operations; |
| ● | Wheel loader equipped with a 2.3 m³ bucket, used for various support activities and as a backup loading unit if required; |
| ● | Water truck with a capacity of 20 m³, used for dust suppression on roads and working areas; |
| ● | Motor grader with approximately 140 HP engine power, used for road and yard maintenance and other auxiliary services; |
| ● | Utility pickup vehicle, used for supervision and transport of small loads. |
Mining operations are planned to occur over eight months per year (dry season). Table 16.10 presents the basic project parameters.
| GoldMining Inc. NI 43-101 Report – São Jorge Project | Page 207 |
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