Seismic Velocity Changes in Dongtan Mining Area Based on Ambient Noise
Based on the seismic ambient noise cross-correlation method,we calculate the relative veloc-ity variation within the underground medium.We utilize continuous waveform data from the CCH and BDS stations at Dongtan mine,spanning from 2 a.m.on February 8,2022,to 7 a.m.on March 8,2023.The analysis focuses on the correlation between these velocity changes and both the mining op-eration and seismic activity at the 63up06 working face.The findings reveal a notable impact of the mining operation at the 63up06 working face on the wave velocity within the underground medium.Additionally,a clear correlation exists between the changes in wave velocity and the incidence of mine earthquakes,highlighting the interplay between variations in underground stress levels and seismic e-vents.Furthermore,the release of underground stress during mine earthquakes can lead to slight fluc-tuations in wave velocity.
万方数据
维普
