Conference Proceedings
Third International Symposium on Rock Fragmentation by Blasting, Brisbane, August 1990
Conference Proceedings
Third International Symposium on Rock Fragmentation by Blasting, Brisbane, August 1990
Development of a Dynamic Blasting Simulation
Blasting, particularly bench blasting, uses finite length cylinders of explosive close to two free faces. The rock to be blasted is usually intersected by a complex 3-D system of joints. To fully simulate a blast, a 3-D dynamic model is required. It is shown that the static stress distribution around a long cylinder can be reproduced by superposing the static stress distribution of a suitable chain of spheres. Thus, the dynamic results for individual spheres given by Favreau (1969) can now be substituted for the static results to give a dynamic model of the stress distribution around a long cylinder. Comparison of measured and computed waveforms show that the measured waveforms are much more attenuated and dispersed than expected. The consequences for explosive evaluation and design are Discussed.
Contributor(s):
G Harries
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- Published: 1990
- PDF Size: 0.402 Mb.
- Unique ID: P199005018