An Investigation On The Blasting Strain Fields Between The Adjacent Bopeholes With Dynamic Moire-Photoelasticity And Strain Gages

Zhu Zhenhai; Sun Yanjun

doi:10.1117/12.967416

1 January 1987 An Investigation On The Blasting Strain Fields Between The Adjacent Bopeholes With Dynamic Moire-Photoelasticity And Strain Gages

Zhu Zhenhai, Sun Yanjun

Author Affiliations +

Proceedings Volume 0817, Optomechanical Systems Engineering; (1987) https://doi.org/10.1117/12.967416
Event: 31st Annual Technical Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, San Diego, CA, United States

Abstract

The blasting strain fields between the adjacent boreholes initiated simultaneously were investigated with the dynamic moire-photoelasticity and the strain gages. A multiple spark dynamic photoelastic apparatus (Mode WZDD-1) and the super-dynamic. measuring system were utilized in the dynamic recording. According to the dynamic moire-photoelastic fringe patterns, the superposition of blasting stress waves was analysed, and the distribution of az(in the direction of the line linking two adjacent borehole centers, which is simply called linking-center line in the following) and ar (in the direction which is normal to the linking-center line) in the linking-center line and ea. in the line which is vertical to the linking-center line through the middel point of the linking-center line were calculated quantitatively. The oscillations of strain vs. time in the linking-center line due to the superposition of blasting stress waves were recorded with the foil strain gages. The laws of superposition and attenuation of stress waves between boreholes derived from the measured and calculated results are in agreement with the results from the theoretical analyses.

Citation Download Citation

Zhu Zhenhai and Sun Yanjun "An Investigation On The Blasting Strain Fields Between The Adjacent Bopeholes With Dynamic Moire-Photoelasticity And Strain Gages", Proc. SPIE 0817, Optomechanical Systems Engineering, (1 January 1987); https://doi.org/10.1117/12.967416

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available