高压空化水射流破碎岩石的试验研究

igh-pressure cavitating water jet is successful test in using destruct energy of cavitating. Compare with ordinary high-pressure water jet, it have great increase in erosion, destruct capability. How to get the maximum rock-breaking efficiency is always the aim of the rock-breaking technical research. With equipments of the high-pressure cavitating water jet, experiments of breaking sandstone were made. The relation between effect and cavitating, pump pressure，ambient pressure, standoff distance and erosion time was presented by numerically analyzing the results. A series of experiments of breaking grit stone were carried out with equipments of the high-pressure cavitating water jet. The results show that the erosion depth increases proportionally with the pump pressure and decreases as the ambient pressure increasing on the same experimental condition. Erosion happens in the first few minutes, and after that, erosion does not increase with time. The erosion depth of the convergent-st