南华大学学报（自然科学版）2025，Vol.39Issue(5)：10-18,9.DOI:10.19431/j.cnki.1673-0062.2025.05.002
超声诱导纳米气泡破裂对砂岩铀矿孔隙结构损伤的影响
Effects of Ultrasound-induced Nanobubble Rupture on Pore Structure Damage of Sandstone Uranium Ore
摘要
Abstract
This study investigated the damage mechanism of pore structure in sandstone u-ranium ore induced by the rupture of nanobubbles under ultrasonic excitation,using a sin-gle-factor experimental approach.The effects of ultrasonic time(0.5-3 h)and ultrasonic power(0.6-1.4 kW)on porosity variation were thoroughly examined.Microstructural changes were observed by scanning electron microscopy(SEM),and the evolution charac-teristics of the pore structure were quantitatively characterized using nuclear magnetic reso-nance(NMR)technology.The results showed that ultrasound-induced nanobubble rupture significantly increased the porosity of the samples from 32.75%and 34.25%to 38.96%and 41.55%,respectively,with corresponding porosity change rates of 18.96%and 21.31%.NMR T2 spectral analysis revealed a rightward shift of signal peaks,indicating an increase in average pore size,with a decrease in the proportion of small and medium pores and a marked increase in large pores.SEM images further confirmed that ultrasonic-induced rupture of nanobubbles effectively restructured the pore architecture of sandstone.关键词
纳米气泡/孔隙结构/砂岩/微观损伤效应Key words
nanobubbles/pore structure/sandstone/microscopic damage effect分类
矿业与冶金引用本文复制引用
刘晓慧,李婷,崔朝,李广悦..超声诱导纳米气泡破裂对砂岩铀矿孔隙结构损伤的影响[J].南华大学学报（自然科学版）,2025,39(5):10-18,9.基金项目
国家自然科学基金面上项目(52374126) （52374126）
