Photogrammetric Monitoring of Rock Mass Behavior in Deep Vein Mining Donovan Benton, Mining Engineer Stephen Iverson, Mining Engineer Jeffrey Johnson, Mining Engineer Lewis Martin, Research Mechanical Engineer NIOSH, Office of Mine Safety and Health Research Spokane, WA
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Photogrammetric Monitoring of Rock Mass Behavior in Deep Vein Mining Donovan Benton, Mining Engineer Stephen Iverson, Mining Engineer Jeffrey Johnson,
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Photogrammetric Monitoring of Rock Mass Behavior in DeepVein MiningDonovan Benton, Mining EngineerStephen Iverson, Mining EngineerJeffrey Johnson, Mining EngineerLewis Martin, Research Mechanical Engineer
NIOSH, Office of Mine Safety and Health ResearchSpokane, WA
Outline
• Field photogrammetry system• Lab photogrammetry system• Measurement verification
FieldLab
Lab verification
Field Photogrammetry System
• Three auxiliary lights• Nikon D80 camera• Sigma 10mm-20mm lens• Tripod• Survey control points
Simple field setup
• Camera spacing• Distance to face• Pixel density• Control points or scale
D
D/5 to D/8
plan view
Photogrammetry Reconstruction
FaultTrace
• Three pairs merged
Quality Improvement
January 2013--camera handheld using flash
May 2013--Tripod, auxiliary lights, timed exposure