煤炭工程 ›› 2015, Vol. 47 ›› Issue (2): 102-105.doi: 10.11799/ce201502033

• 研究探讨 • 上一篇    下一篇

煤层爆破地震波传播特征实验研究

景林波,李忠辉,冯俊军,李学龙,刘永杰,苑广华   

  1. 中国矿业大学安全工程学院
  • 收稿日期:2013-10-24 修回日期:2013-12-03 出版日期:2015-02-10 发布日期:2015-02-15
  • 通讯作者: 景林波 E-mail:jinglinbo888@163.com

Experimental Study on Coal Blasting Seismic Wave Propagation Characteristics

  • Received:2013-10-24 Revised:2013-12-03 Online:2015-02-10 Published:2015-02-15

摘要: 为了研究高应力作用下具有冲击特性的单一煤层中爆破地震波传播特征,利用YDD16煤岩动力灾害声电监测仪对煤体卸压爆破产生的地震波信号进行了现场测试,并对采集到的信号进行了时域和频域上的分析。将煤岩体抽象成Maxwell粘弹性体,推导了地震波在Maxwell粘弹性体中传播特征。实验结果表明:地震波主频率随着传播距离的增加呈现幂级递减;在单一煤层中,地震波主频率是影响地震波波速幅值衰减系数变化的主要原因,且与主频率存在良好的正相关关系;地震波最大振幅衰减规律符合y=ax3+bx2+cx+d,且衰减速率呈现出较为明显的先增大后减小的现象

关键词: 煤层, 爆破地震波, 传播特征, 频域

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

中图分类号: