Failure mode analysis of electronic detonator under high overload condition

Ren, Dongmei; Hou, Jian; Duan, Jia-rong; Ye, Yinghua; Liu, Xiao-bao; Liu, Dabin

doi:10.1016/j.fpc.2022.02.001

Cited by 5 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considering the rock mass properties, the delay time between holes was selected as 25 ms (MS2), the delay time between rows as 75 ms (MS4), and the delay time of charge in holes as 460 ms (MS11). Because the actual and the nominal delay of detonator have large discreteness [37][38][39], there is normally a delay error. Terefore, in the actual initiation process, a hole-by-hole initiation with a small delay time was adopted [40][41][42][43].…”

Section: Detonation Tubes Detonated Hole-by-holementioning

confidence: 99%

Experimental Study on Frequency Modulation Damping Effect of Digital Detonator in Road Clearance Blasting

Gao

Cheng

Ren

et al. 2023

Shock and Vibration

View full text Add to dashboard Cite

To measure and evaluate the impact of vibration on the surrounding buildings and structures during highway rock burst removal and to formulate scientific and reasonable protective technical measures, the authors used the blasting perilous rock removal project of the K2227+920–K2228+000 section of the Shaanxi G316 road as a case study. The application of frequency modulation blasting vibration damping technology adopting digital electronic detonators was investigated. The difference in vibration peak and frequency between the perforation-by-hole initiation of the detonator and the frequency modulation initiation of the digital electronic detonator is compared. The results showed that by adopting an accurate delay of digital electronic detonators and the damping scheme of adjusting the blasting vibration frequency using the electronic detonators a reduction in blasting vibration velocity can be achieved. For an unchanged blasting scale, hole mesh parameters, and explosive unit consumption, the total blasting time was adjusted in the test. Compared to the hole-by-hole initiation, the blasting vibration velocity at a pier of the G85 Baohan highway bridge located 52 m away was reduced from 0.367 cm/s to 0.229 cm/s, a decrease of 36.7%. The field test demonstrated that frequency modulation and vibration attenuation using digital detonators can reduce blasting vibrations and effectively reduce the influence of blasting construction on surrounding buildings and structures.

show abstract