Memorias de investigación
Ponencias en congresos:
Ranges of validity of some distribution functions for blast-fragmented rock
Año:2015
Áreas de investigación
  • Ingenieria civil
Datos
Descripción
The general ranges of validity of some distribution functions are assessed from their behaviour with 119 sets of fragmentation data from bench blasting obtained by sieving. The emphasis is on determining the lower size/passing limit that the size-scaled Rosin-Rammler, Grady and Swebrec functions, and their bi-component versions, can represent with reasonable precision. By fitting these functions to the data using different weights, the accuracy of the fit varies in the different size/passing zones, so that an overall knowledge of the capacity of the function is obtained across the whole size range, from the coarse zone to the fines. Reasonable ranges of use of bimodal Rosin-Rammler and extended Swebrec (all of them 5-parameter, bi-component distributions) are, in terms of percentage passing p, 99>p>2 % (up to 100 % for the extended Swebrec), or 90>p>0.5 %, in which the expected error of the calculated size is below 15 % in the extremes of the range, and less than 5 % in most of the central range; maximum errors (i.e. errors that will only rarely be exceeded) are typically less than 50 % in the central range, and up to about 100 % in the extremes. Ranges of use for the Swebrec and the size-scaled Rosin-Rammler (3-parameter distributions), with only slightly larger errors than the bi-components, are 100>p>5 % or 80>p>2 %. The classical 2-parameter Rosin-Rammler can be used in the range 95>p>20 % or 90>p>10 %, with expected and maximum errors less than about 15 % and 100 % respectively.
Internacional
Si
Nombre congreso
11th International Symposium on Rock Fragmentation by Blasting ? FRAGBLAST 11
Tipo de participación
960
Lugar del congreso
Sydney, Australia
Revisores
Si
ISBN o ISSN
978-1-925100-32-7
DOI
Fecha inicio congreso
24/08/2015
Fecha fin congreso
26/08/2015
Desde la página
741
Hasta la página
748
Título de las actas
Proceedings 11th International Symposium on Rock Fragmentation by Blasting
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Ingeniería de Georrecursos y Modelización
  • Departamento: Ingeniería Geológica y Minera