Underground Conveyors
CRUSHING & CONVEYING SOLUTIONS FOR UNDERGOUND MINING
As the mining industry turns to more sustainable practices and underground operations go deeper, TNT’s safe and robust underground crushing and conveying solutions offer a better alternative to diesel fueled trucks for long -distance hauls and transport of extracted rock and minerals.
Our mining platform affiliate company specializes in underground mine development, and together we work closely with mine owners to provide a holistic approach to overcome the unique challenges of underground mining operations – improving safety, reliability, efficiency and productivity.
TNT understands extreme underground conditions and has designed and delivered high quality underground to surface materials handling systems worldwide. In harsh and challenging underground mining environments, our crushing and conveying systems can handle any challenge – from mass excavation limitations to maintenance and operations in confined spaces, spillage and dust mitigation requirements.
Our solutions include conveying a variety of raw materials with complex requirements such as ore passes and reclaim, conveyor declines, switch backs, skip loading stations, and extreme temperature variance between underground and surface conveyances.
Complete underground materials handling systems that are up to the challenge
TNT and our mining platform affiliated company bring complete underground to surface mine development and materials handling capabilities to virtually any mining application.
With practical knowledge of underground mining development and a highly experienced team, TNT beings design, supply, installation, commissioning and maintenance capabilities under one roof.
You can turn to TNT with confidence for turnkey underground development, crushing and conveying solutions that can transport mined ore from crusher to surface materials handling systems with ease.
KEY BENEFITS OF TNT’S UNDERGROUND CONVEYING SYSTEMS
Safety
Sophisticated safety and monitoring technologies such as heat and vibration sensing, fire retardant belting, fire resistant idlers, automated fire suppression and dust abatement.
Modularization
Our systems come modularized and pre-assembled leading to safer, more cost-effective construction, with quicker assembly times and reduced labor requirements.
Reliability
State-of-the-art drives and control systems, active take-ups, dynamic braking and advanced condition monitoring equipment for preventative maintenance.
Built to Last
Our systems utilize robust mine duty structures and components which are suitably sized to meet the owner’s availability, throughput and productivity requirements.
Energy Efficient
We optimize crushers and conveyors with belt class, pulley sizes, idler spacing, appropriate drive configurations, take-up types and components for energy efficient operation.
Built for Underground
Hanging modules, floor mounted tables, modular drive terminals, pulley modules, belt reel stations, and take-up units consider constraints of confined spaces.
IN-HOUSE ENGINEERING EXPERTISE
TNT has delivered underground conveyor systems worldwide in some of the most challenging environments for a range of extracted rock and minerals. Our in-house engineering team design customised efficient systems using the latest technology and tools to deliver a robust solution that meets your underground crush-convey productivity and safety requirements.
UNDERGROUND CRUSHING & CONVEYOR DESIGN FEATURES
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Crushing Stations
The underground primary crushing station is a critical component of the material handling system. The type, size and location of the station are all crucial to delivering ore and waste materials from the underground mine to the surface plant.
Working closely with the mine design and development team is an important part of delivering a system that is safe, cost effective and reliable. The mining method, mass excavation constraints, ore delivery and desired product size all contribute to the selection of the primary crusher and associated equipment for ore processing.
Our expert team have worked with clients to develop underground primary crusher stations utilizing gyratory, jaw, and roll crushers to meet overall mine production requirements.
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Truck Dump, Ore Pass & Storage
Ore can be delivered to the primary crusher station directly by haul trucks or trams, or indirectly through ore passes or underground storage silos. Incorporating a truck dump station with static grizzly and surge bin will help to control ore top size feed to the primary crusher, with the surge bin acting as a buffer between trucks and to regulate throughput to the downstream conveyor system.
The surge bin capacity can also be used to mitigate potential loss of production at shift changes when the crushing and conveying system can continue to operate.
We develop systems that maximize equipment availability by ensuring appropriate storage is provided to suit the mine’s operating philosophy.
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Shaft Loading Stations
Production shafts for hoisting ore and waste from underground mines operate with a very high availability. Material storage at the shaft loading station must consider planned and unplanned downtime of the upstream equipment to ensure production targets are met. There are several shaft loading systems depending on the throughput and skip cycle time requirements.
We can develop silo reclaim and skip loading systems that meet throughput and skip cycle times with conveyors feeding weigh flasks, or high speed/high-capacity conveyor direct loading systems where the material is weighed on the belt and queued for the skips arrival at the loading pocket.
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Conveyor Dynamic Analysis
Our expert team carefully analyses all dynamic conditions to mitigate risk and ensure the appropriate drive, braking, electrical and mechanical systems are properly integrated for the safe, reliable, and efficient long-term operation of your underground conveyor system.
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Discrete Element Method Modelling
By undertaking Discrete Element Method (DEM) material flow modelling, we analyse how bulk materials move through transfer points and interact with the conveyor belt to optimise throughput, reliability, performance and switchback transfer points. This method is effective in identifying build-up, blockages and wear so we can design your conveyor system to operate with greater efficiency for longer, and without expensive unplanned downtime.
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Variable Speed Drives
Our underground conveyor systems use the latest state of the art drive systems with Variable Frequency Drive (VFD) speed control, dynamic/proportional braking, and condition monitoring technologies.
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Ancillary Devices
We carefully select and integrate a range of ancillary devices to meet the needs of your project, including longline onboard safety systems, dust control, smart monitoring, belt scales, metal detectors, cleaning systems and magnets to protect people and equipment.
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