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Tiltmeter data analysis windpipe project, Whitepine.

Authors
Kirkpatrick-CG
Source
NTIS: PB/80-190572 :45 pages
Link
NIOSHTIC No.
10000926
Abstract
Analysis of the data produced by a wide-band, sensitive, horizontal, biaxial motion sensor revealed several distinctive patterns before, during, and after a roof fall. The signals prior to the roof fall are similar in spectra, but 1,000 times larger in amplitude, than those after the roof fall. Immediately preceding the roof fall, by 2 to 12 hours, five events occurred that were larger in amplitude and lower in frequency than even the large preroof fall background signals. An interpretation of these events is presented.
Publication Date
19790101
Document Type
CP; Final Contract Report
Funding Type
Contract
Fiscal Year
1979
NTIS Accession No.
PB80-190572
NTIS Price
A04
Identifying No.
OFR-66-80
NIOSH Division
DRC
Source Name
NTIS: PB/80-190572
State
IA; CO
Performing Organization
Rockwell International
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