This paper introduces and discusses the successful cases of ultrasonic breaking technology in related fields, summarizes the three basic forms of ultrasonic action on rocks, namely, resonance...
By reviewing the developmental history of ultrasonic-assisted crushing technology, this paper expounds the technical characteristics and evolution of ultrasonic-assisted crushing and the technical basis and advantages of ultrasonic-assisted …
Ultrasonic-assisted rock crushing leverages the impact and resonance of high-frequency ultrasonic vibration on rocks, along with the destructive effect of cavitation bubble movement and collapse near rock surfaces, enhancing rock breakdown.
The new technique of using ultrasonic vibration to break hard rock is still in the experimental stage, but it has significant potential for improving the efficiency of hard rock crushing. We have analyzed the mechanical properties of granite under ultrasonic vibration and the characteristics of the damage produced.
In recent years, ultrasonic vibration rock-breaking technology has aroused great interest in tunnel excavation and underground mineral. To apply this technology to practical engineering, it is nece...
Ultrasonic vibration is a process of cyclic loading with an extremely small period. In the first half of one cycle, the impact body strikes the rock with kinetic energy, causing the displacement of shallow mineral crystals.
The results show that ultrasonic pre-crushing in a specific frequency range effectively induced internal micro-cracks in the rock block, reduced the strength of the rock block, and disintegrated its internal structure.
Inspired by the dynamic impact theory and the particle jet technique, an ultrasonic vibration field-induced ultra-high-frequency particle impact rock-breaking (UPIRB) technique was proposed to solve these problems.
The findings observed in this study can open new aspects in application of ultrasonic waves and can be used to address several technical issues in geophysical and geotechnical engineering in which the granular materials are subjected to compression and particle crushing.
Ultrasonic vibration rock crushing technology is a new type of rock crushing method, and it can be used in hard rock drilling. By applying high-frequency cyclic load to the rock, it promotes the expansion and penetration of micro-cracks inside the rock, causing fatigue damage, reducing the rock strength, and thus improving the rock crushing ...