Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
UNCERTAINTY IN MEASUREMENTS OF VIBRATIONS FROM BLASTING
Year:2012
Research Areas
  • Civil engineering
Information
Abstract
Vibrations from blasting were measured with two or three tri-axial transducers mounted side by side in 37 blasts. The sensors were anchored or sandbagged to the rock. They were oriented towards the blast using three methods, namely: accurate orientation with total station (with bearing errors of only few degrees), visual orientation and wrong orientation (with an intentional bearing error of about ±30º). Uncertainties are described by the relative standard error of the mean, and they have been calculated for peak particle velocity and maximum spectral amplitude. The resulting uncertainties show, on the one hand, that vibration measurements can be quite precise if the sensors are anchored and pointed accurately to the blast, which gives a quantitative statement of the unavoidable experimental errors, and on the other, that higher errors can be incurred when vibrations are not properly measured. The mean uncertainty of carefully implemented measurements (good sensor-to-ground coupling and accurate orientation) can be as low as 2.5 % for the peak particle velocity and 1.1 % for the maximum spectral amplitude; for measurements with poor sensor-to-ground coupling or poor sensor orientation (which are sometimes the conditions in ordinary vibration monitoring in quarries and construction works), the mean uncertainty can be as high as 8.2 % for the peak particle velocity and 15.8 % for the maximum spectral amplitude. The implications of these uncertainties in the assessment of compliance with vibrations from blasting standards are highlighted.
International
Si
JCR
Si
Title
ROCK MECHANICS AND ROCK ENGINEERING
ISBN
0723-2632
Impact factor JCR
1,19
Impact info
Volume
45
10.1007/S00603-012-0229-Y
Journal number
6
From page
1119
To page
1126
Month
JUNIO
Ranking
9 de 30 ENGINEERING, GEOLOGICAL (tercil T1)
Participants
  • Autor: Pablo Segarra Catasus (UPM)
  • Autor: Lina Maria Lopez Sanchez (UPM)
  • Autor: Jose Angel Sanchidrian Blanco (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Ingeniería de Georrecursos y Modelización
  • Departamento: Ingeniería Química y Combustibles
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