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[1]程兵,汪海波,王梦想,等.炮孔偏心不耦合装药爆破效应数值模拟[J].中国安全生产科学技术,2018,14(7):40-47.[doi:10.11731/j.issn.1673-193x.2018.07.006]
　CHENG Bing,WANG Haibo,WANG Mengxiang,et al.Numerical simulation on blasting effect of blast hole with eccentric decouple charge[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(7):40-47.[doi:10.11731/j.issn.1673-193x.2018.07.006]
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炮孔偏心不耦合装药爆破效应数值模拟
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
14
期数:
2018年7期
页码:
40-47
栏目:
学术论著
出版日期:
2018-07-31

文章信息/Info

Title:
Numerical simulation on blasting effect of blast hole with eccentric decouple charge
文章编号:
1673-193X(2018)-07-0040-08
作者:
程兵; 汪海波; 王梦想; 宗琦
（安徽理工大学 土木建筑学院，安徽 淮南 232001）
Author(s):
CHENG Bing;  WANG Haibo;  WANG Mengxiang;  ZONG Qi
(School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan Anhui 232001, China)
关键词:
偏心不耦合装药; 爆破效应; 裂纹分布; 爆炸应力场; 数值模拟
Keywords:
eccentric decouple charge;  blasting effect;  crack distribution;  explosive stress field;  numerical simulation
分类号:
X936;TD235
DOI:
10.11731/j.issn.1673-193x.2018.07.006
文献标志码:
A
摘要:
为了研究炮孔偏心不耦合装药爆破效应，利用非线性动力分析平台，模拟了不同不耦合系数时炮孔周围的裂纹分布情况以及同心不耦合装药和偏心不耦合装药形成的爆炸应力场。研究结果表明：耦合侧裂纹总长度、裂纹平均长度和最长裂纹长度始终大于不耦合侧，不耦合系数为1.71时耦合侧与不耦合侧裂纹总长度、裂纹平均长度和最长裂纹长度的差值和比值都达到最大，K=1.71为改进偏心不耦合装药结构的最佳不耦合系数；同心不耦合装药形成的爆炸应力场在炮孔周围均匀分布，偏心不耦合装药形成的爆炸应力场则偏向于耦合侧，由于药卷周围不均匀的空气间隔对爆炸载荷产生了不同程度的缓冲和延迟作用，偏心不耦合装药不耦合侧等效应力峰值小于耦合侧，且不耦合侧等效应力峰值出现时间也滞后于耦合侧。
Abstract:
In order to study the blasting effect of blast hole with the eccentric decouple charge, the crack distribution around the blast hole under different decouple coefficients and the explosive stress field formed by the concentric decouple charge and eccentric decouple charge were simulated by using the nonlinear dynamic analysis platform. The results showed that the total crack length, the average crack length and the longest crack length at the coupling side were always greater than those at the decouple side. When the decouple coefficient was 1.71, both the difference and ratio of the total crack length, the average crack length and the longest crack length at the coupling side and the decouple side reached the maximum values, and K=1.71 was the best decouple coefficient for the improved eccentric decouple charge structure. The explosive stress field formed by the concentric decouple charge distributed evenly around the blast hole, while that formed by the eccentric decouple charge leaned towards the coupling side. Due to the buffer and delay effect with different degree of the uneven air spacing around the cartridge on the explosive load, the peak equivalent stress at the decouple side was smaller than that at the coupling side for the eccentric decouple charge, and the appearance time of the peak equivalent stress at the decouple side was also delayed than that at the coupling side.

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备注/Memo

备注/Memo:
国家自然科学基金项目（51374012）;安徽省科技攻关计划项目（1501041123）
更新日期/Last Update: 2018-08-09