MONITORING AND HHT ANALYSIS ON THE INFLUENCE OF TUNNEL STRUCTURE BY CLOSE DISTANCE BLASTING

There was a harmful effect on the safety of the tunnel by close distance blasting vibration.HHT and regression analysis were used to analyze the monitoring data of blasting vibration.The results showed that with the quantity of explosive in existence,blasting operations could not impact the tunnel which had been built or was in construction;the instantaneous energy could be well used as a characterization of the impact of the structure in the momentary,while it could more intuitively reflect the influence of blasting vibration on the structure than analysis by single speed.It has some guiding significance to related projects.