Safety and energy distribution characteristics of rock breaking gas generator

doi:10.16265/j.cnki.issn1003-3033.2023.02.1482

Abstract

Abstract:

In order to reduce the problem that traditional blasting was prone to produce secondary disasters such as strong vibration, a new rock breaking gas generator was developed. The combustion safety was evaluated, the field test was carried out and the blasting vibration was monitored. The principal components of the gas blasting signal were extracted using the TQWT and Hilbert Huang transform analysis methods, and the time-frequency characteristics of different components of the signal were analyzed. The results show that the new rock breaking gas generator has high transportation safety, good combustion stability and low vibration intensity, and it has significant advantages in soil and rock blasting. The amplitude, energy ratio and correlation coefficient of each component of rock breaking gas blasting signal meet the nonlinear positive correlation. The quantity of the instantaneous energy peak of the dominant component is closely related to the number of blasting sections of the blast hole. The differential charging method should be adopted in rock breaking gas blasting, and the charge quantity at the orifice and the bottom of the blast hole should be appropriately increased in order to achieve the optimal blasting effect. The new rock breaking gas generator blasting technology has significant vibration and damage reduction effects, and is suitable for popularization and application in soil and rock blasting engineering.

Key words: rock breaking gas generator, safety, energy distribution, instantaneous energy, tunable Q-factor wavelet transform(TQWT)

FU Xiaoqiang, YU Jin, DAI Liangyu. Safety and energy distribution characteristics of rock breaking gas generator[J]. China Safety Science Journal, 2023, 33(2): 118-124.

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