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Burden, spacing and borehole diameter at rock blasting
Luleå tekniska universitet.
1992 (English)In: International Journal of Mining, Reclamation and Environment, ISSN 1748-0930, E-ISSN 1748-0949, Vol. 6, no 3, p. 141-149Article in journal (Refereed) Published
Abstract [en]

Most text books on rock blasting claim that the relationship between burden and borehole diameter is linear. The statistical calculation presented here with real values from one hundred open pit and underground mines indicates that the relationship follows a power function. For underground mines the burdens are consistently lower than those for open pit mines because of higher ore densities, greater confinement in blasting, and finally greater demand for well fragmented rock. The results shown in this paper are recommended to be considered in basic teaching of rock blasting technique. The formulas can be used for a first rough estimation of practical burden and spacing. The formulas do not however give any information about the fragmentation. For that purpose it is necessary to use other formulas not described in this paper.

Place, publisher, year, edition, pages
1992. Vol. 6, no 3, p. 141-149
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-9322DOI: 10.1080/09208119208944329Scopus ID: 2-s2.0-0026958458Local ID: 7ec3ec70-2ccd-11dd-9c9b-000ea68e967bOAI: oai:DiVA.org:ltu-9322DiVA, id: diva2:982260
Note

Godkänd; 1992; 20080528 (cira)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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