Home Journals Articles Updates About
CN
image
收藏切换
Study on Stress Concentration Effect of Large-Diameter Empty Hole in Burn Cut Blasting
收藏切换
PDF
Hai-li MENGa, b, Peng-chang SUNa, b, Li XUEa, b, Yong-quan KANGa, b
Blasting | 2023, 40(4) : 60 - 65
Less
收藏切换
Blasting | 2023, 40(4): 60-65
• BLASTING IN ORE AND ROCK •
Study on Stress Concentration Effect of Large-Diameter Empty Hole in Burn Cut Blasting
Full
Hai-li MENGa, b, Peng-chang SUNa, b, Li XUEa, b, Yong-quan KANGa, b
Affiliations
  • a.Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China
  • b.State Key Laboratory for Track Technology of High-Speed Railway, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China
Published: 2023-12-01 doi: 10.3963/j.issn.1001-487X.2023.04.008
Outline
收藏切换

To explore the mechanical mechanism of burn cut blasting with a large-diameter empty hole, the stress concentration effect of the large-diameter empty hole was studied by theoretical analysis and numerical simulation. Firstly, a mechanical model for the stress concentration effect of the empty hole was established. Furthermore, the empty hole's stress concentration effect was clarified based on the elasticity theory and wave dynamics. A numerical simulation under a typical working condition was then carried out, and finally the stress concentration effect of the empty hole was investigated based on the numerical results of stress wave propagation, rock damage, and the first principal stress. The results show that the stress concentration effect of the empty hole is mainly derived from the stress concentration around the cavity and the stress wave superposition effect. During the blasting process, the stress wave is reflected at the empty hole wall and superposed with the incident wave, which is mostly located in the vicinity of the empty hole and the region between the cut holes. The regions with high damage degree are mainly around the cut hole, near the empty hole, and within the triangle regions formed by adjacent cut holes and the empty hole, and the latter two regions correspond to the stress wave superposition regions. There is a significant stress concentration effect near the empty hole, and the closer the rock is to the empty hole, the more obvious the effect is.

tunnel engineering  /  cut blasting  /  numerical simulation  /  stress concentration effect  /  empty hole
Hai-li MENG, Peng-chang SUN, Li XUE, Yong-quan KANG. Study on Stress Concentration Effect of Large-Diameter Empty Hole in Burn Cut Blasting[J]. Blasting, 2023 , 40 (4) : 60 -65 . DOI: 10.3963/j.issn.1001-487X.2023.04.008
Funding
Less
  • Major Project of China Academy of Railway Sciences Corporation Limited(2021YJ066)
  • Youth Talent Lift Project of Beijing Association for Science and Technology(BYESS2022219)
Appendix
Less
Year 2023 volume 40 Issue 4
PDF
80
32
Cite this Article
BibTeX
Article Info
doi: 10.3963/j.issn.1001-487X.2023.04.008
  • Receive Date：2022-11-29
  • Online Date：2026-03-19
  • Published：2023-12-01
Article Data
Affiliations
History
  • Received：2022-11-29
Funding
Major Project of China Academy of Railway Sciences Corporation Limited(2021YJ066)
Youth Talent Lift Project of Beijing Association for Science and Technology(BYESS2022219)
Affiliations
    a.Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China
    b.State Key Laboratory for Track Technology of High-Speed Railway, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China

Corresponding:

SUN Peng-chang (1994-), male, assistant researcher, Ph. D, mainly engaged in rock dynamics and engineering blasting, (E-mail) .
References
Share
https://castjournals.cast.org.cn/joweb/bp/EN/10.3963/j.issn.1001-487X.2023.04.008
Share to
QR

Scan QR to access full text

Cite this article
BibTeX
Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
关闭全屏
  • BibTeX
  • EndNote
  • RefWorks
  • TxT
Links
Articles
Latest Articles
Most Read
Collections
Updates
Events
News
Multimedia
About
About Us
Contact
No. 86 Xueyuan South Road, Haidian District, Beijing
100081
010-62199257
qkjq@cast.org.cn

Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House