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| EXPERIMENT AND APPLICATION OF BUNCH-LONG-HOLE BLASTING TECHNIQUE |
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| DOI： |
| KeyWord:Bunch-long-hole Parallel-and-close layout Extrusion blasting, |
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| Abstract: |
| Bunch-long-hole blasting is a new kind of blasting technique.From 1986 to 1990,tests and studies on bunch-long-hole blasting were made.After that the new technique has successfully been used in mining production with desired results achieved.It is proved in practice that the new technique features high bursting efficiency,good safety and low blasting cost.In this paper,basic tests on the mechanism of bunch-long-hole blasting are outlined,calculation and selection of blasting parameters,and its application to mining production are described with blasting effects analysed. |
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