›› 2016, Vol. 37 ›› Issue (2): 399-406.doi: 10.16285/j.rsm.2016.02.012

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Precursors to compression failure of cemented backfill mass based on the multiparameter method

XU Wen-bin1, 2, WANG Yun-min2, DANG Peng1, YIN Tian-jun1, ZHANG Tong1   

  1. 1. School of Resources & Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China; 2. State Key Laboratory of Safety and Health for Metal Mines, Sino Steel Maanshan Institute of Mining Research Co., Ltd., Maanshan, Anhui 243000, China
  • Received:2014-11-03 Online:2016-02-11 Published:2018-06-09
  • Supported by:

    This work was supported by the National Natural Science Foundation of China(51504256), the Open Fund of the State Key Laboratory of Safety and Health for Metal Mines(zdsys006) and the National Program on Key Basic Research Project of China(2013CB227903).

Abstract: The stress-strain, resistivity and temperature variations of backfill materials in the whole process of uniaxial compression are studied using a self-designed synchronous monitoring system, which is composed of the loading control system, strain measurement system, the resistivity collection system and the thermal infrared (TIR) observation unit. The precursory anomaly characteristics of the stress-strain, resistivity and TIR are observed before backfill body failure. The sensitivity and difference of different monitoring systems to the same failure event are also compared. The results show that the time-space evolution process of the resistivity and TIR is quite close to the whole process from compression deformation to failure of backfill body, showing apparent staged characteristics. The precursory information point of resistivity occurs prior to the TIR and the stress points. The resistivity variation has an apparently anti-symmetry feature in the process of compression, compared to the stress-strain relation and temperature variation. The variation of resistivity can give a detailed description of the internal structure change at every phase during compression. However, the TIR information mainly represents the surface temperature evolution during the process of compression before plastic yielding of the backfill. The multiparameter methodology used to evaluate the precursory information during loading process can overcome the disadvantages of early-warning approach, say low reliability and inaccuracy. The proposed method is an effective one in determining the stable state of backfill body.

Key words: cemented backfill body, compression failure, precursor information, multiparameter

CLC Number: 

  • TD 853.34

[1] XU Wen-bin ,SONG Wei-dong ,WANG Dong-xu ,MA Yue,. Characteristic analysis of deformation failure and energy dissipation of cemented backfill body under triaxial compression [J]. , 2014, 35(12): 3421-3429.
[2] WANG Chun-qiu ,JIANG Bang-you ,GU Shi-tan ,TAN Yun-liang ,. Study of precursor information recognition and multiparameter early warning before rockburst of island fully mechanized caving face [J]. , 2014, 35(12): 3523-3530.
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