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Vibrations from Underground Blasting.

Authors
Snodgrass-JJ; Siskind-DE
Source
NTIS: PB 236 985 :31 pages
Link
NIOSHTIC No.
10001689
Abstract
The Bureau of Mines has investigated vibration levels produced by blasting at four underground sites to establish how such factors as type of explosive, delay blasting, charge weight, and geology affect amplitudes of ground motion. A summary of the work is presented, and the results of further analysis of the data are discussed. Square root scaling was found applicable to two of the underground sites and could be applied with minor error to all the sites. Comparison of empirical propagation equations in the different rock types indicates that although the site effect is apparent, the combined data may be used as a basis for engineering estimates of vibration amplitudes from subsurface blasting in many different rock types. Recommendations for predicting and minimizing vibration amplitudes from underground blasts are given.
Publication Date
19740101
Document Type
IH; Report of Investigations
Fiscal Year
1974
NTIS Accession No.
PB-236985
NTIS Price
A04
Identifying No.
RI 7937
NIOSH Division
TCRC;
Source Name
NTIS: PB 236 985
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