Experiment research and application of borehole-blasting of spiral tube shape charge

被引：0

作者：

Deng Y. ^{[1
]}

Ma H. ^{[1
,2
]}

Wang L. ^{[3
]}

Zhang Z. ^{[3
]}

Wang Y. ^{[1
]}

Shen Z. ^{[1
]}

机构：

[1] CAS key laboratory of Mechanical Behavior and Design of Materials (LMBD), University of Science and Technology of China, Hefei

[2] State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei

[3] Darch Construction Group CO., LTD., Zhoushan

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2020年 / 39卷 / 12期

关键词：

Cumulative blasting; Deep borehole blasting; Radial jet; Root bottom of blasting; Spiral tube shaped charge;

D O I：

10.13465/j.cnki.jvs.2020.12.009

中图分类号：

学科分类号：

摘要：

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 systemwere done. The results show that there is shaped effect when spiral aluminium tube as shaped charge liner, and there are radial penetration cracks in the inner wall of the residual 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. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.

引用

页码：63 / 69

页数：6

共 18 条

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