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Gold Science and Technology ›› 2017, Vol. 25 ›› Issue (3): 92-97.doi: 10.11872/j.issn.1005-2518.2017.03.092

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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

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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

CLC Number: 

  • TD323

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