Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Assessment of the error of blast vibrations measurements
Year:2009
Research Areas
  • Mining operation
Information
Abstract
The seismic field produced by blasting was measured in ten rounds at an open pit mining. Three tri-axial geophones and one uniaxial geophone were used in each round. The transducer mounts were firmly bolted to the bedrock and positioned very close each other. A total station was used to orient the geophones towards the gravity centre of the blasts, so that the contribution of the bearing error to the uncertainty of the measurements is kept to a minimum. The error of the peak particle velocity (ppv) and dominant frequency (fft) is estimated from the 95 % upper value of the distribution of relative standard errors (ratio of the standard error of the mean to the mean). The uncertainty is 5.9 % for ppv and up to 27.2 % for fft. These values are used as a baseline to investigate the influence of ground coupling in the reliability of the measurements. For this purpose already published vibration measurements for four works were analyzed and discussed.
International
Si
Congress
9th International Symposium in Rock Fragmentation by Blasting- Fragblast 9
960
Place
Granada (España)
Reviewers
Si
ISBN/ISSN
978-0-415-48296-7
Start Date
13/09/2009
End Date
17/09/2009
From page
551
To page
560
Rock Fragmentation by Blasting: Proceedings of the 9th International Symposiumon Rock Fragmentation by Blasting- Fragblast 9
Participants
  • Participante: Javier Gutierrez (Saint Gobain Placo Ibérica, S.A)
  • Autor: Pablo Segarra Catasus (UPM)
  • Autor: Jose Angel Sanchidrian Blanco (UPM)
  • Autor: Lina Maria Lopez Sanchez (UPM)
  • Autor: Enrique Querol Aragon (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Ingeniería de Georrecursos y Modelización
  • Grupo de Investigación: Seguridad Industrial: atmósferas explosivas
  • Departamento: Ingeniería Química y Combustibles
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