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Gold Science and Technology ›› 2017, Vol. 25 ›› Issue (6): 92-98.doi: 10.11872/j.issn.1005-2518.2017.06.092

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Damage Analysis of Solid Waste Rock Cemented Filling Body Based on Acoustic Emission Probability Density Function

CAO Shirong，HAN Jianwen，LI Yongxin，WANG Xiaojun，FENG Xiao，ZHUO Yulong   

  1. Jiangxi Key Laboratory of Mining Engineering，Jiangxi University of Science and Technology，Ganzhou   341000，Jiangxi，China
  • Received:2017-03-30 Revised:2017-06-28 Online:2017-12-30 Published:2018-05-18

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Abstract:

Solid waste rock cemented filling body is the key load bearing structure of ensuring safety mining of mines，in order to investigate its actual load bearing damage and failure process，the acoustic emission tests of four groups of cemented filling specimens with different coarse aggregate contents were carried out under uniaxial compression and cyclic loading on the RMT-150C rock mechanics test system.Results showed that four groups of samples has significant Kaiser effect under cyclic loading，and the number of acoustic emission events of three groups  of specimens containing block stones was more abundant，and 152%，225% and 300% of pure tailings were reached before the peak stress.At the same time，the acoustic emission probability density equations of four groups of cemented filling body with different block stone contents were obtained by using the correlation between acoustic emission probability density and stress level.Quantitative analysis of bearing damage process of cemented backfill by acoustic emission parameters was carried out by acoustic emission probability density fuction.It can be seen that the addition of ballast can effectively slow down and inhibit pre-injury by contrast damage variable-stress level curve，when the ballast content is 20%，the best results can be achieved.

Key words: probability density function, acoustic emission, loading and unloading, waste rock, cemented filling body, safety mining

CLC Number: 

  • TD853.34

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