Research On Blasting Seismic Wave Influencing Factor And Propagation Mechanism

Blasting seismic effect is a endanger in blasting project which requires strictprevention, however, because the complexity mechanism action and diversitypropagation process of blasting seismic wave, the research is difficult. Based on existingtheories, this paper according to the model experiments and Numerical Simulationtechniques, analyzed and discussed blasting seismic wave propagation rule andinfluencing factors.In order to analyze the characteristics of blasting seismic waves comprehensive andobjective, we study three different experimental models: By the cube model experiments,observed the bulge movement, and in accordance with changes in charge parameters andmonitor data analysis to prove the correctness of dual-source transfer mechanism,summarized the causes of blasting seismic waves; By cuboid model experiments oncharge of blasting parameters and effects on seismic wave propagation, and fitting theblasting vibration velocity of seismic wave attenuation in the model experiments rule; Byelevation step model elevation changes on seismic wave propagation analysis fittingsuitable elevation change of vibration velocity propagation formula. On the basis of theexperiment model,using finite element analysis software were compared withexperimental results, conclusions are as follows:Near blasting area, there is a big error in the calculation of blasting vibration bySadov’s vibration formula; The depth of charge and charging structure will have a greater impacton blasting seismic wave propagation rule; When calculating the vibration velocity by Sadov’svibration formula, need to be considered the depth of charge equation, added to the impact factor d inthe formula; The main factors that caused altitude effect is the second source of blasting,The attenuation rule of vibration velocity in same stepped surface can be used "edgeeffect" to explain; When considering the altitude effect, Sadov’s vibration formula is nolonger applicable, in this paper, using linear regression obtained the best formula.This paper summarizes the conclusions of blasting seismic waves, but also pointedout the problems of model experiments and precautions, which can provide a referencefor further research.