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Mining Publication: Damage Delineation in Structures Using Laser Vibrometry and Remote Excitation
Keywords: Ground falls Vibration meters
This page is archived for historical purposes and is no longer being maintained or updated.
Original creation date: June 2004
Authors: PL Swanson, J Rettkowski
Conference Paper - June 2004
Download PDF Document (0.39 MB)
NIOSHTIC2 Number: 20026119
Proc 2004 SEM X Intl Congress and Exposition on Experimental and Applied Mechanics (Costa Mesa, CA, June 7-10, 2004). Bethel, CT: Society for Experimental Mechanics, 2004 Jun; :1-7
As part of a research program to reduce injuries and fatalities in the U.S. mining workforce, NIOSH is investigating the potential use of noncontact vibration measurements to identify hazardous ground fall conditions. In the present study, the effectiveness of remote vibration sources in exciting resonant responses in damaged structures is examined. Initial experiments were performed on a damaged concrete slab in a controlled environment. Vibration response was measured with a laser Doppler vibrometer using both single-point and two-dimensional array recordings. Excitation sources included direct mechanical impacts to remote portions of the slab and a remotely located industrial demolition hammer. Surficial damage was effectively delineated with both sources through visualization of vibration response in spectral bands selected to discriminate wave propagation from large-scale slab resonance effects.
Image of publication Damage Delineation in Structures Using Laser Vibrometry and Remote ExcitationConference Paper - June 2004
Download PDF Document (0.39 MB)
NIOSHTIC2 Number: 20026119
Proc 2004 SEM X Intl Congress and Exposition on Experimental and Applied Mechanics (Costa Mesa, CA, June 7-10, 2004). Bethel, CT: Society for Experimental Mechanics, 2004 Jun; :1-7
See Also
Developments in Sealant Support Systems for Ground Control
Feasibility of Using Laser-Based Vibration Measurements to Detect Roof Fall Hazards in Underground Mines
Investigation of Electromagnetic Emissions in a Deep Underground Mine
Multiple Seam Mining Interactions: Case Histories from the Harris No. 1 Mine
Multiple-Seam Mining in the United States: Background
Multiple-Seam Mining Interactions: Case Histories from the Harris No. 1 Mine
Reducing the Risk of Ground Falls During Pillar Recovery
Sizing of Final Stumps for Safer Pillar Extraction
Three-Dimensional Time-Lapse Velocity Tomography of an Underground Longwall Panel
Time-Lapse Tomography of a Longwall Panel: A Comparison of Location Schemes
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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