单轴压缩下不同饱和度红砂岩横波特征研究  

Experimental study on the acoustic parameters of red sandstone affected by water saturation

作　　者：程锦山 管华栋 王观石[1,2] 汪永超 林强 CHENG Jinshan;GUAN Huadong;WANG Guanshi;WANG Yongchao;LIN Qiang(Jiangxi Key Laboratory of Environmental Geotechnical and Engineering Disaster Control,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;School of Civil and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)

机构地区：[1]江西理工大学江西省环境岩土与工程灾害控制重点实验室,江西赣州341000 [2]江西理工大学土木与测绘工程学院,江西赣州341000

出　　处：《有色金属科学与工程》2024年第1期105-114,共10页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金项目资助(41462009);江西省高等学校井冈学者特聘教授岗位资助项目(205201200003);江西省教育厅科学技术研究资助项目(GJJ190499);江西理工大学人才培养资助项目(205200100112);桥梁无损检测与工程计算四川省高校重点实验室2021年度开放基金项目(2021QYY01)。

摘　　要：为了研究饱和度对岩石超声波横波传播规律影响,以红砂岩为研究对象,开展不同饱和度下入射频率分别为50、100、200 kHz的超声波横波传播实验,分析饱和度及入射频率对横波声学参数变化规律。结果表明:干燥至饱和状态,横波波速随饱和度增大呈非线性下降趋势,幅值衰减系数随饱和度增大呈非线性递增趋势,均满足三次函数关系,属于高度相关;整体分析发现横波波速受饱和度变化影响大于幅值衰减系数,幅值衰减系数拟合参数能较好反映岩样物理量的变化;基于敏感性及决定系数的综合考虑,建议今后采用100 kHz作为含水砂岩超声波横波测试优势频率。研究成果可为不同饱和度下岩石超声波测试技术发展提供参考。To study the influence of saturation on the ultrasonic shear wave propagation law of rocks,with red sandstone as the research object,ultrasonic shear wave propagation tests were conducted with frequencies of 50,100 and 200 kHz under different saturations,and the variation law of saturation and frequency on shear wave acoustic parameters were analyzed.The results show that the shear wave velocity decreases nonlinearly with increasing saturation,and the amplitude attenuation coefficient increases nonlinearly with increasing saturation,both of which meet the cubic function relationship and are highly correlated.The overall analysis shows that the influence of saturation on shear wave velocity is greater than that of the amplitude attenuation coefficient,and the fitting parameters of the amplitude attenuation coefficient can better reflect the changes in physical quantities of rock samples.Based on the comprehensive consideration of sensitivity and determination coefficient,it is suggested to use 100 kHz as the dominant frequency of ultrasonic shear wave testing for water-bearing sandstone in the future.The research results can provide a reference for the development of rock ultrasonic testing technology under different saturations.

关 键 词：饱和度 超声波横波 横波波速 幅值衰减系数 入射频率 

分 类 号：O426.2[理学—声学]