Use of piezoaccelerometers to detect seismic waves from blasting in rocks

Autor:	E. G. Karpunov, Yu. M. Misnik, M. A. Nefedov
Rok vydání:	1977
Předmět:	Frequency response Shadow zone General Engineering Geology Radius Seismic noise Geotechnical Engineering and Engineering Geology Seismic wave symbols.namesake Rise time symbols Rayleigh wave Vertical seismic profile Seismology
Zdroj:	Soviet Mining Science. 13:526-530
ISSN:	1573-8736 0038-5581
DOI:	10.1007/bf02498471
Popis:	These par~-~ters of the movements of the medium during blasts in ledge rocks are characterlstic of zones 20-30 times ROz (where ROz is the radius of the charge). Measurements closer to the center of the blast do not give usable results owing to destruction of the transducers [4]. Strengthening the transducer also fails to solve the problem, because the limited frequency response of the method cannot ~n principle permit measurements at distances less than 20ROz: The reduction in the rise time as we approach the center of the blast leads to a rapid increase in the errors of measurement owing to the need to correct the signals. Correction of the rise times in the velocity traces is also necessary if small charges are used.
Databáze:	OpenAIRE
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