摘要
利用RMT-150C岩石力学试验系统和PCI-2型声发射采集系统,对灰砂比为1∶4的纯尾砂充填体与块石作骨料的胶结充填体在不同幅值循环加卸载条件下损伤破坏全过程的声发射特性进行了研究。试验结果显示:含块石充填体在循环载荷下损伤破坏过程声发射信号较纯尾砂充填体更加丰富,且均表现出在加卸载应力幅值为80%的阶段声发射活动最为平静的共性。试验数据处理结果表明:充填体Kaiser效应的有效应力区间为相对应力水平低于70%,超过这一区域后,Kaiser效应失效,Felicity效应显著。
By using RMT-150 C rock mechanics test system and PCI-2 type acoustic emission acquisition system,the acoustic emission characteristics of rock under different amplitude cyclic loading during complete damage failure process under uniaxial compression were studied to pure tailings backfill and ballast as filling aggregate.Experimental results show that acoustic emission signal of ballast cemented backfilling body is more abundant than pure tailing filling body under the cyclic loading damage failure process,and it is shown that the acoustic emission activity is most quiet in the stage of loading and unloading stress amplitude is 80%.At the same time,the experimental results show that the effective stress range of filling body Kaiser effect is lower than 70%,when the stress is higher than this,the Kaiser effect is invalid,and the Felicity effect is significant.
作者
曹世荣
肖伟晶
李永欣
王晓军
卓毓龙
冯萧
CAO Shirong XIAO Weijing LI Yongxin WANG Xiaojun ZHUO Yulong FENG Xiao(Faculty of Resource and Environmental Engineering,Jiangxi University of Science and Teehnology, Ganzhou 341000, Jiangxi, China Jiangxi Key Laboratory of Mining ＆Metallurgy Environmental Pollution Control, Ganzhou 341000,Jiangxi, China)
出处
《黄金科学技术》
CSCD
2017年第3期92-97,共6页
Gold Science and Technology
基金
国家自然科学基金项目"循环载荷下矿山固废胶结充填体损伤过程声发射特性研究"(编号:51304083)
江西省科技支撑计划项目"急倾斜薄脉群钨矿床开采岩体失稳控制技术集成与示范"(编号:20141BBE50005)联合资助
