Monitoring analysis of blasting shock effect motivating coal and gas outburst
XIE Xiong-gang
FENG Tao
YANG Jun-wei
LIU Hui
Abstract：Taking the 1261 working face blasting in a outburst-prone mine for examples, speed and frequency of blas-ting vibration were tested in the stress-relaxed area and stress-concentration area ahead of the working face. The testing data on the working face were regressed to disclose the relationships between vibration velocity, explosive charge and propagation distance. With "db7" wavelet method, the frequency spectrum of blasting vibration, the energy distribution and the motivating effect of blasting shock effects on the coal and gas outburst were analyzed, h is shown by monitoring analysis that blasting vibration effect in the stress-relaxed area and stress-concentration area ahead of the working face is so slight that it can' t destroy coal seam directly, after coal seam in the two areas obtaining blasting vibration energy, the danger of gas outburst in working face will increase. According to the energy equation and the conditions in work-ing face, the blasting scheme was regulated, the motivating effect of blasting shock effects of the two areas on the coal and gas outburst in working face can be reduced to a degree.
Keywords：blasting shock effectcoal and gas outburstworking facevibration monitoringmotivating effect
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 255-259 )