Powder factor analysis of quarry blasts through the fragmentation-energy fan concept

Sanchidrián Blanco, José Angel and Segarra Catasus, Pablo and Navarro Miguel, Juan and Castedo Ruiz, Ricardo (2019). Powder factor analysis of quarry blasts through the fragmentation-energy fan concept. In: "45th Annual Conference on Explosives and Blasting Technique", 27-30 enero 2019, Nashville, TN, USA. pp. 519-532.

Description

Title: Powder factor analysis of quarry blasts through the fragmentation-energy fan concept
Author/s:
  • Sanchidrián Blanco, José Angel
  • Segarra Catasus, Pablo
  • Navarro Miguel, Juan
  • Castedo Ruiz, Ricardo
Item Type: Presentation at Congress or Conference (Article)
Event Title: 45th Annual Conference on Explosives and Blasting Technique
Event Dates: 27-30 enero 2019
Event Location: Nashville, TN, USA
Title of Book: Proceedings of the 45th Annual Conference on Explosives and Blasting Technique
Date: 2019
Subjects:
Faculty: E.T.S.I. de Minas y Energía (UPM)
Department: Ingeniería Geológica y Minera
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This paper investigates fragmentation in an aggregate quarry in the light of the fragmentation-energy fan concept. Six blasts were monitored, located one behind the other in the same quarry area. The rock structure was blocky, the water level and the usage of explosives were variable within and between the blasts. The powder factor above grade was between 0.28 and 0.44 kg/m3. Fragmentation of the plant feed was measured using an online digital image analysis system and three belt scales. The oversize material that was not directly fed to the plant after the blast corresponds to 3‒9.3 % of the total. Data from image analysis was used to build the size distribution in the coarse range (fragments above 120 mm), and the passing fractions at 120 and 25 mm obtained from belt scales data were used in the range 120‒25 mm. The non-dimensional percentile sizes between 10 and 90 % for each blast are described through power functions of the powder factor above grade; the model coefficients are statistically significant. From them, using the principles of the fragmentation-energy fan and the Swebrec distribution properties, the fragmentation can be expressed in terms of the powder factor by means of five parameters: the fan focus coordinates and the three parameters of a function of the exponents vs. the percentage passing. The model shows a good capability to describe fragmentation.

Funding Projects

TypeCodeAcronymLeaderTitle
Universidad Politécnica de Madrid007033MAXAM Civil Explosives programUnspecifiedCátedra MAXAM

More information

Item ID: 64658
DC Identifier: http://oa.upm.es/64658/
OAI Identifier: oai:oa.upm.es:64658
Deposited by: Memoria Investigacion
Deposited on: 20 Oct 2020 06:31
Last Modified: 20 Oct 2020 06:31
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