花岗岩声发射多期应力记忆方向独立性的试验研究  

Experimental Study on Directional Independence of Multistage Stress Memory in Granite Acoustic Emission

作　　者：马春德[1] 阳文源 刘泽霖 赵俊康[3] MA Chunde;YANG Wenyuan;LIU Zelin;ZHAO Junkang(School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China;School of Civil Engineering,Central South University,Changsha 410075,Hunan,China;Institute of Mineral and Geological Exploration,Zijin Mining Group Co.,Ltd.,Xiamen 361006,Fujian,China)

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083 [2]中南大学土木工程学院,湖南长沙410075 [3]紫金矿业集团股份有限公司矿产地质勘查院,福建厦门361006

出　　处：《矿冶工程》2024年第5期1-6,共6页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(52074352);湖南省自然科学基金(2023JJ30680)。

摘　　要：为了研究花岗岩在压缩荷载阶梯循环下偏转加载时多期应力记忆方向独立性,采用自制的偏转加载装置对花岗岩进行不同偏转角度的阶梯循环加卸载试验,研究岩石在偏转加载循环后记忆先前多次循环中最大应力的凯塞效应(KE)以及抹录不净现象(IEP)。结果表明:花岗岩KE以及IEP均具有方向独立性,KE方向独立性存在的临界角度为10°,IEP方向独立性存在的临界角度为12°;偏转角度达到12°后,IEP会干扰KE对历史最大应力的记忆。To investigate directional independence of multistage stress memory during progressive cyclic loading of granite under compression with a series of deflection angle,experiments were conducted on cyclic loading and unloading of granite with different deflection angles by using a self⁃made deflection device.The Kaiser effect(KE)and the incomplete erasion phenomenon(IEP)of the maximum stress in previous multistage cycles after progressive cyclic loading with deflection angles were explored in the experiments.Results show that both KE and IEP in granite exhibit directional independence.The directional independence of KE has a critical angle of 10°and the directional independence of IEP has a critical angle of 12°.With a deflection angle of 12°,the IEP will interfere with the memory of historical maximum stress by KE.

关 键 词：单轴压缩 花岗岩 地应力 声发射法 凯塞效应 抹录不净现象 偏转加载 多期应力记忆 突变点 

分 类 号：TD315[矿业工程—矿井建设]