Fragmentation Analysis - Fundamental Processes

Abstract

To investigate the effect of energy on rock fragmentation, initial testing was carried out using a drop test device. A total of 180 specimens of Wausau quartzite and anorthosite of 3.0 to 3.5 inch size were fragmented in this device. An analysis of the fragment distribution results of the drop tests showed that the energy applied was approximately inversely proportional to the mean fragment size. However, these results were not totally conclusive because of the limited energy available and the narrow band of drop heights available. A total of 270 irregular 3.0 to 3.5 inch specimens and 150 disc-shaped specimens of Wausau quartzite, anorthosite, and Felch marble were then fragmented with the impact pendulum device. Computer programs were written to analyze sieve data and to provide energy calculations. Results indicated that a power law could be obtained that provided the inverse relation between specific crushing energy and mean fragment size.

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Document Details

Document Type
Technical Report
Publication Date
Dec 31, 1973
Accession Number
AD0774894

Entities

People

  • C. W. Schultz
  • D. I. Kurth
  • L. S. Sundae

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Compressive Strength
  • Computational Science
  • Computer Programs
  • Crystal Structure
  • Data Analysis
  • Distribution Functions
  • Drop Tests
  • Experimental Data
  • Impact Tests
  • Mechanics
  • Normal Distribution
  • Photographs
  • Physical Properties
  • Plastic Explosives
  • Tectosilicates
  • Tensile Strength
  • Test Methods

Readers

  • Aerosol Science/Aerosol Physics
  • Explosive Engineering.
  • Mechanical Engineering/Mechanics of Materials.