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黄金科学技术 ›› 2017, Vol. 25 ›› Issue (3): 92-97.doi: 10.11872/j.issn.1005-2518.2017.03.092

• 采选技术与矿山管理 • 上一篇    下一篇

循环载荷下块石胶结充填体声发射特性研究

曹世荣 1,2,肖伟晶 1,2,李永欣 1,2,王晓军 1 ,2*,卓毓龙 1,2,冯萧 1,2   

  1. 1.江西理工大学资源与环境工程学院,江西  赣州   341000;
    2.江西省矿业工程重点实验室,江西  赣州   341000
  • 收稿日期:2016-11-23 修回日期:2017-02-23 出版日期:2017-06-30 发布日期:2017-09-11
  • 通讯作者: 王晓军(1979-),男,山西晋中人,副教授,从事工程岩体稳定性分析与控制等方面的研究工作。bugcsr@163.com
  • 作者简介:曹世荣(1993-),男,江西景德镇人,硕士研究生,从事岩体稳定性方面的研究工作。1219969230@qq.com
  • 基金资助:

    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)和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

Study on AE Characteristics of Cyclic Loading and Unloading of Ballast Cemented Backfilling Body

CAO Shirong 1,2,XIAO Weijing 1,2,LI Yongxin 1,2,WANG Xiaojun 1,2,ZHUO Yulong 1,2,FENG Xiao 1,2   

  1. 1.Faculty of Resource and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou   341000,Jiangxi,China;
    2.Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control,Ganzhou   341000,Jiangxi,China
  • Received:2016-11-23 Revised:2017-02-23 Online:2017-06-30 Published:2017-09-11

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。

关键词: 块石, 胶结充填体, 循环加卸载, 声发射, Kaiser效应, Felicity效应

Abstract:

By using RMT-150C 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.

Key words:  ballast, cemented backfilling body, cyclic loading and unloading, acoustic emission, Kaiser effect, Felicity effect

中图分类号: 

  • TD323

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