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Gold Science and Technology ›› 2017, Vol. 25 ›› Issue (1): 93-98.doi: 10.11872/j.issn.1005-2518.2017.01.093

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Study on Stress-Strain Relationship of Cemented Backfilling with Different Aggregate Content

CAO Shirong，HAN Jianwen，XIAO Weijing，ZHUO Yulong，WANG Xiaojun，FENG Xiao   

  1. Jiangxi Key Laboratory of  Mining＆Mining Engineering，Jiangxi University of Science and Technology，Ganzhou    341000，Jiangxi，China
  • Received:2016-07-25 Revised:2016-11-23 Online:2017-02-28 Published:2017-05-12

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Abstract:

In order to study the influence of bulk aggregate on the stress-strain relationship of  backfilling，four groups of different aggregate replacement rate backfilling specimens were tested by uniaxial compression test in the RMT-150C rock mechanics test system.Experimental results show that aggregate has great influence on the physical parameters such as stress and strain，elastic modulus and so on.The strength of backfilling can be significantly improved with the amount of aggregate，at the same time to ensure that the variable performance of the absorption.It shows that the structure is another key factor with the exception of the material and the ratio who influence the peak stress and strain，this can provide  reference for the preparation of backfilling material for mining.The peak values of the four groups were 0.28，0.33，0.26 and 0.30，respectively.The peak strength and the damage degree of the filling with aggregate  content of 20%was the highest.The constitutive relation model of damage mechanics is more accurate to describe the stress and damage in the pre-peak stage of aggregate backfilling.

Key words: aggregate, backfilling, mechanical behavior, constitutive relation

CLC Number: 

  • TD853

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