ICGCM Papers:
Ground Control Monitoring Systems and Practices
 
 
Photogrammetric Monitoring of Rock Mass Behavior in Deep Vein Mining
33rd International Conference on Ground Control in Mining
Photogrammetric Monitoring of Rock Mass Behavior in Deep Vein Mining
by
Donovan J BentonStephen IversonJeffrey C JohnsonLewis A Martin, NIOSH, Office of Mine Safety and Health Research, Spokane, United States
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Author's Presentation PPT
[Conference] 33rd International Conference on Ground Control in Mining
[Price] Free  [Comments] 0
[Topical Area] Ground Control Monitoring Systems and Practices
[Author] Donovan J BentonStephen IversonJeffrey C JohnsonLewis A Martin, NIOSH, Office of Mine Safety and Health Research, Spokane, United States
[Abstract] 
Key Conclusions:
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The ability of photogrammetry to replicate existing point-based measurement methods is proven. Optimization of methodology for direct quantity-based measurements is currently being completed, with indications of future success. Laboratory testing of representative samples is being conducted to establish volume-energy relationships for field application.
Key Findings:
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Two-dimensional testing of a photogrammetric system has shown its accuracy to be within 1 part in 250 (error < 0.5%). This is comparable to existing measurement techniques. Three-dimensional testing has revealed an accuracy that is within 1 part in 55 (error < 2%). Since there are no equivalent technologies already proven in this application, comparison of error cannot be made.
Objective of the Paper:
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The goal of this research is to develop a method of supplementing existing point-based measurement practices with quantity-based photogrammetric measurements. Applications will include monitoring excavation closure, rock mass integrity, and fault zones. A combination of laboratory and field testing could lead to the possibility of back-calculating energy transfer using volumetric measurements obtained through photogrammetry.
Problem Statement:
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There are currently no common ground monitoring techniques that can make direct volumetric measurements of a rock mass. A method by which volumetric measurements could be made directly would allow for quicker implementations of new, or adaptations of existing, ground control plans. Attention has been drawn to this need by recent incidents involving fault activation in deep vein mining environments.