煤层爆破地震波传播特征实验研究

doi:10.11799/ce201502033

Abstract

Abstract: In order to study blasting seismic wave propagation characteristics in a single coal seam under the high stress and impact properties,and the seismic signal test was carried out of coal unloading blasting using YDD16, and the collected signals in time domain and frequency domain was analysised. Coal and rock abstract into Maxwell viscoelastic body, and seismic wave propagation characteristics in the viscoelastic body Maxwell was deduced. The experimental results show that: seismic dominant frequency decrease with the increase of propagation distance present power level; In single coal seam, the main reasons of seismic wave amplitude attenuation coefficient decreases are the seismic dominant frequency and there is a good positive correlation relationship with the main frequency. Seismic wave amplitude attenuation rule in y=ax3+bx2+cx+d, and present the phenomenon of a more obvious attenuation rate that increase after the first reduce.

Key words: coal seam, blasting seismic wave, transmission characteristics, the frequency domain

CLC Number:

TD324+.1

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URL: http://www.coale.com.cn/EN/10.11799/ce201502033

http://www.coale.com.cn/EN/Y2015/V47/I2/102

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Experimental Study on Coal Blasting Seismic Wave Propagation Characteristics

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