Underground Mining
Deep rock extraction utilizing mechanized narrow-vein and bulk mining methodologies. Precision operations in challenging geologies with comprehensive ground support.
Discuss Your ProjectAdvanced Subterranean Expertise
When high-grade ore bodies are situated too deep for surface excavation, Aurum Strata Global Vision provides the critical geological and geotechnical expertise required to safely unlock these reserves.
This highly specialized discipline demands precision engineering, robust geotechnical planning, and a flawless commitment to operational safety. We partner dynamically with extraction specialists to select the optimal subterranean methodology based on the unique geological specificities of the reserve.
By integrating advanced 3D geological modeling with real-time seismic monitoring, we maximize recovery rates while rigorously maintaining the structural integrity of the surrounding rock mass.
Extraction Methodologies
Comprehensive oversight and feasibility planning for advanced underground mining methods, tailored to ore body geometry and geotechnical conditions.
Narrow Vein Mining
Specialized extraction for orebodies less than 3 meters in width, requiring surgical precision to minimize waste dilution. Our mechanized approach utilizes single-boom and twin-boom electric hydraulic jumbos capable of drilling blastholes in headings as narrow as 1.2 meters.
Ground support installs concurrently using mechanized bolters. Mucking operations employ remote-controlled LHDs, removing operators from unsupported ground.
- Dilution control: <15% waste rock inclusion
- Ground support: Combination bolts, mesh, and shotcrete
- Ventilation: Auxiliary fans and ducting systems
- Applications: High-grade gold-quartz veins, epithermal deposits
Longhole Stoping
Massive mining method utilizing downhole drilling equipment to create large stopes with minimal development requirements. Stoping widths range from 4 meters to 20 meters, utilizing parallel blastholes up to 40 meters in length.
This vertical retreat mining minimizes personnel exposure while maximizing production rates of 500 to 1,500 tonnes per day per stope.
- Drilling: ITH percussion rigs and top hammer systems
- Stope support: Cable bolts and cemented fill
- Extraction: Remote-controlled LHDs and ore passes
- Best for: Steeply dipping, consistent large-scale orebodies
Cut & Fill
Flexible overhand mining suitable for irregular, steeply dipping orebodies where controlled extraction sequencing is required. Operations progress upward in horizontal slices, with each cut backfilled to create the working floor for the subsequent lift.
Backfill systems utilize either pastefill (cemented aggregate slurry) or hydraulic fill with depository farms on surface.
- Drilling: Jumbos and rising drills for breasting
- Fill placement: Reticulation system from surface
- Recovery: Sequential extraction with 85-90% recovery
- Best for: Irregular deposits requiring maximum recovery
Room & Pillar
Horizontal mining methodology for flat-lying deposits, creating a grid pattern of excavated rooms separated by supportive pillars. Pillar size is precisely calculated based on overburden depth and rock mass rating.
Mechanized room-and-pillar utilizes continuous miners or drill-and-blast cycles with shuttle cars and feeder breakers.
- Extraction ratio: 60-75% depending on depth
- Pillar design: Square or herringbone patterns
- Haulage: Battery-powered trucks or conveyor belts
- Best for: Potash, limestone, coal, and stratiform deposits
Vertical Crater Retreat (VCR)
Highly mechanized bulk mining method utilizing large-diameter blastholes (165mm-270mm) drilled from upper levels downward. Cratering charges break successive vertical benches, with ore mucked from underlying extraction levels.
VCR eliminates the need for drilling within the stope, maximizing operator safety while achieving massive production rates.
- Drilling: Down-the-hole (DTH) drills from upper levels
- Charging: Pneumatic loading of ANFO or emulsion
- Mucking: Remote 10-yard LHDs in crosscuts
- Best for: Massive, steeply dipping orebodies with consistent grade
Specialized Equipment
Underground-specific machinery engineered for confined spaces, high-stress environments, and remote autonomous operation.
Two-Boom Jumbo
Twin-arm hydraulic drilling rig for development headings and production drilling with precision positioning.
Load-Haul-Dump (LHD)
Articulated underground loaders with remote operation capability for mucking in unsupported ground.
Shotcrete Sprayer
Robotic spraying systems for rapid ground support application with consistent thickness and minimal rebound.
Zero Harm Philosophy
Underground operations demand uncompromising safety. Our systems integrate real-time monitoring and robust emergency infrastructure.
Ground Support
Immediate support installation protocols with retractable platforms and mechanized bolters. Mandatory resin-grouted bolts within 1.5 tunnel diameters of the face.
Ventilation Control
Forced auxiliary ventilation with 0.25 m³/s per kW of diesel power minimum. Continuous methane and diesel particulate monitoring with automatic alarm systems.
Emergency Systems
Refuge chambers every 300 meters of development, stocked with 96 hours of breathable air, communications, and medical supplies. Dedicated rescue teams on standby.
Tracking & Comms
Leaky feeder radio systems providing 100% coverage, plus tracking tags for all personnel with real-time location monitoring in the surface control room.
Ready to Go Underground?
Discuss your deep-rock extraction challenges with our technical team. We provide feasibility assessments, method selection analysis, and full operational mobilization.
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