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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

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Experimental Research of Fragmentation by Blasting in Various Stemming Lengths of Drill Hole

Fragmentation variation laws in loading and non-loading areas are obtained by cement block model blasting experiments under various stemming lengths. A reasonable ratio between loading length and stemming length is worked out according to minimum average fragment size. The present continuous loading structure, for its very long length to be stemmed, leads to insufficient fragmentation in the upper part of bench. So a new loading structure with bottom air cushion is put forward._x000D_
The author analyzes blasting effects and processes of two loading structures' and proves that there exists a optimal length of air cushion.
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  • Experimental Research of Fragmentation by Blasting in Various Stemming Lengths of Drill Hole
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  • Published: 1990
  • PDF Size: 0.508 Mb.
  • Unique ID: P199005023

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