Experiment research and application of borehole-blasting of spiral tube shape charge
DENG Yongxing1，MA Honghao1,2，WANG Lingui3，ZHANG Zhonglei3，WANG Yixin1，SHEN Zhaowu1
1.CAS key laboratory of Mechanical Behavior and Design of Materials (LMBD), University of Science and Technology of China, Hefei 230026, China;
2.State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China;
3.Darch Construction Group CO., LTD., Zhoushan 316021, China
In order to solve the root bottom extra-insufficient problem of drilling and blasting method, come up with a kind of explosive charge which shaped charge is spiral tube. Firstly, test of this explosive charge to the drilling and blasting system were done. The results show that there is shaped effect when spiral aluminium tube as shaped charge liner, and this explosive charge can generate metal jet to penetrate into the wall of hole, and it can improve the borehole utilization at 7.2% and the borehole expansion rate at 8.4%. Meanwhile, deep borehole blasting test was done in the field. The results show that using this explosive charge should reduce the standoff to improve the effect of penetration. Filling the bottom of borehole during deep borehole blasting, the average depth of the root bottom is 3.6% deeper than general charge, and the standard deviation of depth of the root bottom is 37.5% less than general charge. These researches are of great value in the application of engineering blasting, such as reducing construction cost, speeding up construction progress and improving blasting effect and it is suitable for mining and shaft excavation.
邓永兴1，马宏昊1,2，王林桂3，张中雷3，王奕鑫1，沈兆武1. 螺旋管聚能药包钻孔爆破试验研究与应用[J]. 振动与冲击, 2020, 39(12): 63-69.
DENG Yongxing1，MA Honghao1,2，WANG Lingui3，ZHANG Zhonglei3，WANG Yixin1，SHEN Zhaowu1. Experiment research and application of borehole-blasting of spiral tube shape charge. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(12): 63-69.
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