Multiple stress memory characteristic of rocks under uniaxial deflection loading:Insights from acoustic emission signals
Chunde Ma1
Wenyuan Yang1
Zelin Liu2
Guanshuang Tan1
Junjie Zhang1
1.School of Resources and Safety Engineering,Central South University,Changsha 410083,China2.School of Civil Engineering,Central South University,Changsha 410075,China
摘要：The acoustic emission(AE)method is commonly used to measure in-situ stress,while the Kaiser effect(KE)is usually affected by the stress history and specimen direction.In this study,three types of rocks were tested under uniaxial deflection loading at various deflection angles.Both the KE and the incomplete erasion phenomenon(IEP)were investigated,and the obtained in-situ stress using the AE method was compared with that obtained using the stress relief method.The results demonstrate that both the KE and the IEP exhibit directional independence.The rock type significantly affects the critical angle(θ),with marble showing a higher value(15°)compared to granite(10°)and red sandstone(5°).This is attributed to the initiation and development of interface cracks or crystal interfaces in mineral grains.The similar in-situ stress measured by the AE and stress relief methods suggests that small-angle deflection coring is applicable in engineering.This study provides a reference for in-situ stress measurement using the AE method.
机标关键词：insightsacousticemissionloadingmemoryrocksstressfrom
论文发表日期：2025-10-31
在线出版日期：2026-01-31（本平台首次上网日期，不代表文献的发表时间）
页数：19( 180-198 )
英文信息