Vibration Law and Frequency Spectrum Characteristics of Rock Breaking Technology Based on Dry Ice and Energy-gathered Agent
To understand the influence range and law of vibration induced by rock breaking technology based on dry ice and energy-gathered agent,field tests were carried out in complex sensitive environment.The vibration data was monitored using a micro vibration test system and analyzed.The conclusions were drawn as follows:When the source distance more than 3 m,the vibration velocity is reduced to less than 25 mm/s,which meets the vibration speed re-quirements of the allowable standard of blasting vibration safety.Vibration frequency induced by rock breaking technolo-gy based on dry ice and energy-gathered agent is mainly distributed below 100 Hz.Compared with the vibration induced by mechanical rock breaking,vibration frequency below 50 Hz caused by this new method is more components and larg-er amplitude.Vibration velocity induced by this new method follows a power function attenuation with the increase of the source distance.Slope could accelerate the attenuation of vibration velocity.The vibration velocity decays faster with the increasing of slope angle.Compared with explosive rock breaking,rock breaking technology based on dry ice and ener-gy-gathered agent is unrestricted by the licensing and transportation policies and is convenient to apply in a complex sensitive environment.This study provides an important guide for the application of rock breaking technology based on dry ice and energy-gathered agent.
dry icepneumatic rock breakingvibration lawattenuation lawfrequency spectrum characteristics
万方数据
维普
