Fracture and Comminution of Rock

Abstract

Existing theories of fracture and comminution of rock were examined and applied to an idealized blasting configuration to obtain the resulting particle size distribution. The results were reasonable, but more development is required for practical applications. An exploding wire apparatus was developed to generate tensile fracture data in thickwalled cylinders of Westerly granite. The experimental results were interpreted with the aid of a finite-difference continuum mechanics computer program. It is indicated that fracture initiation in Westerly granite requires more than 600 bar hoop tension, but that crack propagation is possible with less.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1972
Accession Number
AD0753529

Entities

People

  • Ian O. Huebsch
  • John E. Reaugh
  • Robert P. Swift

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Computer Programs
  • Computers
  • Energy
  • Exploding Wires
  • Explosions
  • Explosives
  • Geometry
  • Mechanics
  • Modulus Of Elasticity
  • Particle Size
  • Physics
  • Power Supplies
  • Stress Waves
  • Tensile Strength
  • Transmission Lines
  • Wave Propagation
  • Waveforms

Readers

  • Explosive Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Systems Analysis and Design