Download - Scott Adam - CRC Mining
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FIBRE OPTIC SENSING
FOR UNDERGROUND COAL MINES
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CRCMining – TRANSFORMING MINING
CRCMining is the pre-eminent, industry-driven centre
for global mining research and innovation.
We deliver transformational research and innovations
that maximise mining productivity and enhance
resource utilisation and sustainability.
We develop highly-skilled leaders to drive the
adoption of new mining processes and technologies.
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CRCMining – RESEARCH STRATEGY
› Members develop a common research vision with a
20 year timeframe
› Develop a rolling 8 year roadmap to achieve major
research outcomes for meeting the vision
› From the roadmap continually identify and deliver
solutions that have immediate impact to our
members businesses
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WHAT WILL THE FUTURE LOOK LIKE?
Data Analytics “Companies that successfully use data outperform their peers by
20% and continue to generate additional value through analytic
insights that enable informed data-driven decision-making at an
executive level.1”
1. Mitchell, P 2014, ‘Productivity in mining: now comes the hard part, A global Survey’, Ersnt &
Young and SMI report.
Automation
Real time visualisation
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A UNIQUE SENSING ENVIRONMENT
• Extensively distributed Environment
• Hazardous Area Restrictions
• Oppressive Environment • Dust
• Humidity
• Water
• Corrosion
• No GPS!
• Constantly Evolving Mine Plan
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SENSING REQUIREMENTS IN MINING
Hazardous Area Compatible
High Reliability & Stability
Long Range Remote Operation >20km
High Bandwidth and Sensitivity for Excellent Performance
Small and Lightweight Sensors
Minimum Maintenance in Harsh Operational Environment
Low Life-cycle Cost
Accurate, real-time Measurement
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FIBRE OPTIC SENSING
(QOREX, 2013)
A single optical fibre can replace thousands of conventional sensors
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DISTRIBUTED SENSING - THE FIBRE IS THE
SENSOR
• Technology capable of turning regular fibre optic cable into an
array of temperature or acoustic sensors
• Uses a laser light pulse and the “Rayleigh scattering” effect to
measure strain in the proximity of the fibre
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WHAT CAN WE MEASURE WITH FIBRE
OPTICS?
Rotation
Humidity
Position Sensing
Acceleration
Small Displacements
Strain
Shape
Gas Concentration
Gas Velocity
Acoustic Noise
Pressure
Torque
Temperature
Force
Vibration
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FIBRE OPTIC METHANE SENSING
FOR UNDERGROUND COAL MINES
Transforming Gas Monitoring
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FIBRE OPTIC METHANE DETECTION
Spectroscopic Detection:
Molecular finger print ( to avoid cross sensitivity)
Sensitive
Real-time detection
No electrical power at sensor
Low Cost sensor
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CRCMINING PROTOTYPE METHANE SENSOR
SYSTEM
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CRCMINING PROTOTYPE METHANE SENSOR
SYSTEM
• Six channels fibre optic input/output
• Infra-red laser of 1654nm/ low power
• Outputs RS 485/USB
• Low Cost sensor head
• Early lab results exciting
• Single Calibration
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DISTRIBUTED CONVEYOR MONITORING
Transforming conveyor operations through real-time conveyor
monitoring and failure prediction
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DISTRIBUTED TEMPERATURE SENSING
Temperature is measured to a spatial resolution of 1 m with accuracy to within ±1℃ and at a resolution of 0.01℃.
Optical fibre: Linear Temperature Sensor
Control unit : Laser source, Optical module, Receiver and Micro-processor
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SITE TRAILS – DISTRIBUTED TEMPERATURE
SENSING
9 8 7 6 5 4 3 2 1
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LABORATORY TEST – DISTRIBUTED
ACOUSTIC SENSING
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FIELD TEST – DISTRIBUTED ACOUSTIC SENSING
Fibre Optic Cable
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ACOUSTIC FAILURE SIGNATURE
FAILED IDLER 6 AT STRUCTURE 72
A GOOD IDLER (REFERENCE)
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WHERE TO FROM HERE?
Opportunities for your operations?
• Gases
• Ventilation air velocity
• Humidity
• Dust Levels
• Personnel Detection
• Rock fall Detection
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A VISION FOR TRANSFORMING
MINE SENSING
• CRCMining is developing a suite of fibre optic
sensing solutions for underground coal mining
• High quality stable and accurate, distributed
sensing solutions
• Extensive sensing network is a key enabler for
technology and innovation in underground coal
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CRCMINING TRANSFORMING MINING