A Prediction Method of Peak Vibration Particle Velocity in Cylindrical Charge Blasting

Abstract

The invention discloses a prediction method for peak particle vibration velocity of column charge blasting. On the basis of existing spherical charge blasting vibration theory and stress wave superposition principle, axial detonation velocity influence of charge blasting is considered; a column charge is decomposed into a short column charge with the axial length of d; blasting vibration characteristics of the short column charge are mainly obtained through an Heelan solution; a theoretical solution of blasting vibration of a long column charge is compared with a Sadaovsk formula; and a length influence factor of the charge is introduced in the Sadaovsk formula to calculate the peak particle vibration velocity of column charge blasting. According to the method, the influence of the charge length in column charge blasting on the peak particle vibration velocity is considered, an attenuation relationship of the peak velocity along with a horizontal distance is given out, and the prediction and control of column charge blasting vibration can be realized; and corresponding charge length capable of maximizing the peak particle velocity can be obtained through a calculation model, so that the column charge blasting design can be subjected to peak velocity safety evaluation.

Description

technical field [0001] The invention relates to the field of blasting vibration safety, in particular to a method for predicting the peak velocity of a blasting vibration particle of a columnar charge. Background technique [0002] At present, it is mainly used to predict and control the peak velocity attenuation of the columnar charge blasting vibration particle by a method similar to that of concentrated blasting. This peak velocity prediction method, which mainly considers the influence of the total charge of the charge bag, cannot reflect the characteristics of the columnar blasting vibration. It is increasingly unable to meet the engineering requirements for fine prediction and control of blasting vibration. SUMMARY OF THE INVENTION [0003] The main purpose of the present invention is to overcome the above-mentioned defects in the prior art, and to propose a particle peak velocity prediction method that can comprehensively reflect the blasting vibration characteristi...

AI Technical Summary

Problems solved by technology

[0002] At present, the attenuation of the peak velocity of the blasting vibration particles of the columnar charge is mainly predicted and controlled by a method similar to the concentrated blasting method. This peak velocity prediction method, which mainly considers the influence of the total charge of the charge, cannot reflect the characteristics of the columnar blasting vibration. It has been increasingly unable to meet the engineering requirements for fine prediction and control of blasting vibration

Images