Coalmine Roadway Excavation Blasting Seismic Wave Signal Analysis Based on HHT Method
ZONG Qi1.2，WANG Haibo1.2，XU Ying1.2，FU Jugen1.2
1 School of Civil Engineering and architecture， Anhui university of Science and Technology， Huainan， 232001 China2 National Engineering Laboratory for Deep Shaft Construction Technology in Coal Mine (Huaibei)， Hefei， 230601， China
Abstract：Blasting seismic wave signal frequency spectrum characteristics and energy distribution of coalmine roadway excavation was studied by the HHT method and EMD decomposition. The results show that: the master frequency of roadway excavation blasting in range of 100 Hz to 250 Hz, and the main energy concentrated in range of 160 to 260 Hz; energy distribution in range of 0 to 160 Hz weak, and distributed uniform. Due to millisecond blasting, correspond with particle vibration amplitude, vibration energy mainly concentrated in two time periods: 0.25 s to 0.31 s, 0.35 s to 0.4 s, and there are four instantaneous peaks, the largest instantaneous energy was caused by charge of caving holes. According to the research results, countermeasures for blasting seismic effect reduction were given from view of blasting energy control.
2013, Vol. 32 
