Experimental study on the interaction between oblique incident blast stress wave and static crack by dynamic photoelasticity

2022 ◽  
Vol 148 ◽  
pp. 106764
Author(s):  
Cheng Chen ◽  
Renshu Yang ◽  
Peng Xu ◽  
Chenxi Ding
Keyword(s):  
Experimental Study ◽  
Stress Wave ◽  
Dynamic Photoelasticity ◽  
Static Crack

scholarly journals Experimental Study on Blasting Energy Distribution and Utilization Efficiency Using Water Jet Test

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5340
Author(s):  
Chenxi Ding ◽  
Renshu Yang ◽  
Zhen Lei ◽  
Cheng Chen ◽  
Changda Zheng
Keyword(s):  
Experimental Study ◽  
Energy Distribution ◽  
Stress Wave ◽  
Distribution Ratio ◽  
Water Jet ◽  
Utilization Efficiency ◽  
Lead Azide ◽  
Constraint Condition ◽  
Effective Utilization ◽  
Main Motive

The blasting stress wave and blasting gas generated by explosive blasting are the two main motive powers of rock fragmentation. An experimental method based on water jet test is used to study the energy distribution ratio of blasting stress wave and blasting gas; the utilization efficiency of blasting energy under different borehole constraint conditions is also analyzed. It proves that the blasting stress wave does not cause the water jet, and the blasting gas is the only power of the water column jet. The results show that the energy of the blasting gas and blasting stress wave respectively account for about 64% and 36% of the total energy generated by the explosion of lead azide. The utilization efficiency of the blasting gas energy under strong, medium, and weak constraint conditions is 100%, 80%, and 52%, respectively. The borehole constraint condition is crucial for the effective utilization of blasting energy.

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