VIBRATION VELOCITY PREDICTION METHOD FOR DEEP HOLE BLASTING BASED ON DRONE MEASUREMENTS
At present,the intelligent level of highway subgrade blasting is low,which makes it difficult to accurately predict the blasting vibration velocity during deep hole blasting of subgrade,and the optimization effect of blasting construction is poor.Based on the deep hole blasting project of Weiqing section of Jiqing Middle Line,the un-manned air vehicle(UAV)aerial survey technology is introduced to establish the three-dimensional model of sub-grade blasting.The calculation method of blasting center distance based on UAV photogrammetry and three-dimen-sional model reconstruction technology is proposed,and the accurate calculation of blasting center distance of deep hole blasting of subgrade is realized.The vibration velocity data are obtained through blasting vibration monitoring,and the vibration velocity prediction method of deep hole subgrade blasting is established based on the parameters such as charge,vibration velocity and blasting center distance,which effectively improved the fitting degree and ac-curacy of the prediction formula of blasting vibration velocity,providing a scientific basis for the intelligent design optimization,construction decision-making,and on-site safety management of subgrade blasting.
subgrade blastingUAV photogrammetryexplosive center distancevibration velocity prediction