OFR-66-80 Tiltmeter Data Analysis Windpipe Project, White Pine - Summary
- Organization:
- The National Institute for Occupational Safety and Health (NIOSH)
- Pages:
- 45
- File Size:
- 9384 KB
- Publication Date:
- Jan 1, 1979
Abstract
Analysis of the data produced by a wide-band, sensitive, horizontal, biaxial motion sensor has revealed several distinctive patterns before, during, and after a roof fall. The signals prior to the roof fall are similar in spectra, but one thousand times larger in amplitude, than those after the roof fall. Immediately preceding the roof fall, by two to twelve hours, five events occurred which were larger in amplitude and lower in frequency than even the large pre-roof fall background signals. An interpretation of these events is offered.
Citation
APA: (1979) OFR-66-80 Tiltmeter Data Analysis Windpipe Project, White Pine - Summary
MLA: OFR-66-80 Tiltmeter Data Analysis Windpipe Project, White Pine - Summary. The National Institute for Occupational Safety and Health (NIOSH), 1979.