| 延时起爆技术对中深孔爆破地震波强度的控制 |
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| 作者单位： | ;1.中国葛洲坝工程集团三公司;2.中国葛洲坝工程集团三公司;3.中国葛洲坝工程集团三公司 湖北宜昌443002;4.湖北宜昌443002 |
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| 摘 要： | 减小大孔径中深孔爆破地震波的危害,关键在于控制最高一段起爆药量及产生的爆破振动的能量。本文阐述了在不同的爆区环境下,通过采用孔内分段间隔起爆、孔间分组传爆、排的延时传爆及调整起爆顺序等减振技术措施,可以有效地降低中深孔爆破产生的地震波危害。
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| 关 键 词： | 中深孔爆破 爆破地震波 爆破振动控制 延时起爆 |
APPLICATION OF CHAMBER BLASTING IN EXPLOITATION OF ROCK MATERIAL FOR GOUHOU CONCRETE FACED ROCKFILL DAM |
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| Abstract: | In reconstruction project of Gouhou concrete faced rockfill dam,chamber blasting was selected for exploitation of the dam rock material In this paper,the blasting design is introduced including the layout of charged chambers,the selection of blasting parameters,charge weight and charging structure,priming network and others The statistic result of random sampling has showed that the boulder rate is 7%～8%. In addition,analysis on the cost of chamber blasting is carried out |
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| Keywords: | Faced rockfill dam Exploitation of rockfill Chamber blasting |
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