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Ground Vibrations from Tunnel Blasting in Granite--cheyenne Mountain (Norad), Colo.

Authors
Olson-JJ; Fogelson-DE; Dick-RA; Hendrickson-AD
Source
NTIS: PB 211 944 :25 pages
Link
NIOSHTIC No.
10008896
Abstract
The Bureau of Mines recorded peak particle-velocity levels and vibration frequencies to determine the nature and intensity of ground vibrations for tunnel blast rounds at the NORAD complex, Colorado Springs, Colorado. Previous Bureau of Mines studies in quarries and underground mines had shown that scaling (dividing) the distance from the blast by the square root of the charge weight removed the effect of the various charge weights on vibration amplitudes. The analysis of variance tests performed on the NORAD vibration data, however, indicated that the cube rather than square root scaling exponent grouped the data more effectively. The empirical propagation equation V = 560 (d/w1/3)-2.04, Where V is the maximum peak particle velocity in inches per second, d is the distance from the blast in feet, and w is the zero-delay charge weight in pounds described the attenuation, with distance, of the particle velocities from the tunnel blasts in the Pikes Peak granite of the NORAD complex.
Publication Date
19720101
Document Type
IH; Report of Investigation;
Fiscal Year
1972
NTIS Accession No.
PB-211944
NTIS Price
A03
Identifying No.
RI 7653
NIOSH Division
TCRC;
Source Name
NTIS: PB 211 944
State
CO;
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