爆破震动信号在不同掏槽形式下的HHT分析  

HHT analysis on blasting vibration signal of different cut method

作　　者：原凯 岳中文[1] 付晓强[1] 李明洋[1] 张士春[1] YUAN Kai, YUE Zhong-wen, FU Xiao-qiang, LI Ming-yang, ZHANG Shi-chun(School of Mechanics and Civil Engineering, China University of Mining and Technology （Beijing）, Beijing 100083, China)

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《煤炭工程》2018年第5期100-103,共4页Coal Engineering

摘　　要：为研究钻爆法施工技术对巷道围岩稳定性的影响,减少围岩损伤,通过设计直眼和楔形两种掏槽爆破方案进行相应的爆破实验。利用HHT(Hibert-Huang Transform)法对检测到的爆破震动信号进行分析,得到信号的时频分布和能量谱图,并由此对两种掏槽形式进行比较。结果表明:直眼掏槽信号内主频较高且主频带的范围较小,高频能量的比例较大;楔形掏槽信号主频较低但频带范围较宽,信号内的低频能量比例增加,前者对围岩损伤大于后者且都保证了巷道围岩的稳定性。In order to study the influence of drilling technology on stability of roadway surrounding rock,and to realize the fine blasting and reduce the damage of surrounding rock,cylinder cut and wedge-cut blasting scheme are designed and the corresponding blasting experiments are carried out. The detection of blasting vibration signals is analyzed using HHT method and the time-frequency distribution and energy spectrum of the signal are obtained. Finally, the two cutting schemes are compared and analyzed. The result shows that, main frequency of cylinder cut is higher and the main frequency band is smaller,and the high frequency energy is larger. The main frequency of the wedge-shaped cutting signal is lower but the frequency band is wider,the lower frequency energy ratio in the signal increases,and the surrounding rock damage of the former is greater than the latter,which both can guarantee the stability of roadway surrounding rock.

关 键 词：爆破震动 掏槽 巷道围岩 HHT 

分 类 号：TD236[矿业工程—矿井建设]