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SOME APPLICATIONS OF SEISMIC SOURCE MECHANISM STUDIES TO ASSESSING UNDERGROUND HAZARD.

By:
Edited by:
Gay N.C.Wainwright E.H.

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Abstract

Various measures of the seismic source mechanism of mine tremors, such as magnitude, moment, stress drop, apparent stress, and seismic efficiency, can be related directly to several aspects of the problem of determining the underground hazard arising from strong ground motion of large seismic events. First, the relation between the sum of seismic moments of tremors and the volume of stope closure caused by mining during a given period can be used in conjunction with magnitude-frequency statistics and an empirical relation between moment and magnitude to estimate the maximum possible sized tremor for a given mining situation. Second, it is shown that the 'energy release rate,' a commonly-used parameter for predicting underground seismic hazard, may be misleading in that the importance of overburden stress, or depth, is overstated. Third, results involving the relation between peak velocity and magnitude, magnitude-frequency statistics, and the maximum possible magnitude are applied to the problem of estimating the frequency at which design limits of certain underground support equipment are likely to be exceeded.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
SOME APPLICATIONS OF SEISMIC SOURCE MECHANISM STUDIES TO ASSESSING UNDERGROUND HAZARD.
ISBN:
062006708X
Year Published:
1984
Language:
English
Publisher:
South African Inst of Mining and Metallurgy
Publisher location:
Johannesburg, S Afr
First page:
199
Last page:
208
Number of Pages:
10
Conference Title:
Rockbursts and Seismicity in Mines.
Conference Location:
Johannesburg, S Afr