Affiliation:
1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Abstract
Quantitatively analyzing multidirectional shaped charge blasting energy distribution and improving the rock-fracturing efficiency have been a challenging problem in blasting and civil engineering. In this work, we carry out four groups of concrete model experiments using ultrasonic testing, comparing conventional blasting, and multidirectional shaped charge blasting. Then, the probability and statistics method is used to quantitatively analyze the blasting damage and the energy distribution. The test results show that ultrasonic testing and statistics model can quantitatively evaluate the damage law and energy distribution of blasting. By comparing with conventional blasting method, the multidirectional shaped charge blasting with V-shaped multidirectional shaped energy groove has achieved the effect of energy accumulation. It increases the distribution of energy in the rock crack district, increases the blasting damage range, and improves the rock-fracturing efficiency of blasting. The V-shaped multidirectional shaped energy groove can be used as a new approach for rock fracturing in similar projects.
Subject
Civil and Structural Engineering
Reference22 articles.
1. Controlled blasting with ligamented charge holders
2. A linear shaped charge system for contour blasting;G. Bjarnholt
3. New blasting technology-bilateral cumulative tensile explosion;M. He;Journal of Rock Mechanics and Geotechnical Engineering,2003
4. The Structure Design of Slit-Charge for Directional Fracture Controlled Blasting in Stone Drifting
5. Cumulative blasting experiment study of slotted cartridge based on hard-rock rapid driving technology;R. Yang;Journal of Rock Mechanics and Geotechnical Engineering,2013
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献