Effect of delay time and firing patterns on the size of fragmented rocks by bench blasting

Takashi Sasaoka, Yoshiaki Takahashi, Akihiro Hamanaka, Sugeng Wahyudi, Hideki Shimada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper discusses the size control method of fragmented rocks induced by bench blasting in an open pit mine, especially the effect of delay time and firing pattern. Based on the results of a series of field tests, it can be said that the delay time and firing pattern have an impact on the size of fragmented rocks. The application of two directions of firing pattern that the order of ignition of blast holes is from the center to both ends of the row of blast holes can produce a more uniform size of fragmented rocks compared with that of a one-directional firing pattern which is the order of the ignition of blast holes from one side to the other. Due to the rock mass conditions and products specification, the size of fragmented rocks and its distribution can be controlled by applying an appropriate delay time and firing pattern.

Original languageEnglish
Title of host publicationProceedings of the 28th International Symposium on Mine Planning and Equipment Selection, MPES 2019
EditorsErkan Topal
PublisherSpringer
Pages449-456
Number of pages8
ISBN (Print)9783030339531
DOIs
Publication statusPublished - 2020
Event28th International Symposium on Mine Planning and Equipment Selection, MPES 2019 - Perth, Australia
Duration: Dec 2 2019Dec 4 2019

Publication series

NameSpringer Series in Geomechanics and Geoengineering
ISSN (Print)1866-8755
ISSN (Electronic)1866-8763

Conference

Conference28th International Symposium on Mine Planning and Equipment Selection, MPES 2019
CountryAustralia
CityPerth
Period12/2/1912/4/19

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials

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  • Cite this

    Sasaoka, T., Takahashi, Y., Hamanaka, A., Wahyudi, S., & Shimada, H. (2020). Effect of delay time and firing patterns on the size of fragmented rocks by bench blasting. In E. Topal (Ed.), Proceedings of the 28th International Symposium on Mine Planning and Equipment Selection, MPES 2019 (pp. 449-456). (Springer Series in Geomechanics and Geoengineering). Springer. https://doi.org/10.1007/978-3-030-33954-8_51