摘要
为了研究砂岩的浸水弱化特征,开展了不同浸水时长砂岩试件的单轴压缩声发射试验。结果表明:随着浸水时长的增加试件的强度和弹性模量呈负指数规律降低,峰值变形按照负指数规律增长,最终均趋于稳定数值。声发射b值可较为准确地反映砂岩试件在各个阶段的损伤情况,整体上呈现出波动下降的趋势,岩石失稳破坏时声发射b值急剧下降的现象,可为矿山岩体稳定性监测预警研究提供借鉴与参考。
In order to study the water weakening lawsof sandstone,uniaxial compression acoustic emission tests of sandstone specimens with different soaking time were carried out.The results show that with the increase of immersion time,the strength and elastic modulus of the specimen decrease with a negative exponential law,and the peak deformation increases with a negative exponential law,and finally tends to be stable.The b-value of acoustic emission can more accurately reflect the damage of sandstone specimens in each stage,showing a fluctuating downward trend as a whole.The phenomenon that the b-value of acoustic emission decreases sharply when the rock is unstable and destroyed can provide reference for the monitoring and early warning of mine rock mass stability.
作者
李征
杨斌
高帅
刘昊男
梁胜男
宁晨露
Li Zheng;Yang Bin;Gao Shuai;Liu Haonan;Liang Shengnan;Ning Chenlu(School of Civil Engineering,University of Science and Technology Liaoning,Anshan,China)
出处
《科学技术创新》
2023年第17期67-70,共4页
Scientific and Technological Innovation
基金
辽宁科技大学大学生创新创业训练计划项目经费支持。
关键词
砂岩
浸水弱化
声发射
B值
sandstone
water weakening
acoustic emission
b-value
