GREEN EXTRACTION THERMAL TECHNOLOGY
» No need for people to go into narrow stopes.
» Hardly any explosives with their related safety concerns.
» No potential for explosives damage to surrounding rock, blast cracks disturbing hang wall and related FOG safety issues.
» Less dilution
» Precision extraction
» Less ore to be moved UG and less crushing,
(because of less dilution) knock on effect is smaller everything needed (tunnels, hoists, etc.).
» No need for blast re-entry times.
» All the above = less costs overall
Reducution in mining dilution
- Less volume, higher grade, more ounces
- Continuous possible (no blasting)
- Establishment of a free face for blasting operations
- Significant reduction in blast induced damage
integrated into conventional mining methods
Fast productivity (4 to 8 spalled meters per hour)
Spalled Chips generated are small (5-20mm)
- No need for primary crushing
- Can be hydro transported
Hole length flexibility up to 25m
Equipment required is small, simple, and effective
Hole flexibility from 20cm to 80cm diameter
- Hole diameter can be changed within one hole
- No additional consumables required
Thermal mining method improves safety by moving people away from the exposed span where falls-of-ground are more likely; improves productivity by eliminating re-entry periods mandated when using explosives; reduces dilution by extracting only the ore; and has the potential to increase reserves by making it possible to mine pillars and other isolated blocks-of-ground that may not be economically viable to mine with other methods.
The mining method involves drilling holes on reef, inserting a thermal lance to apply high temperatures inside the hole. The rock then spalls and approximately 30 % of the chips are flushed out of the hole while spalling, with the remaining 70% being cleaned out afterwards.